Shelvey appeared to make contact after aiming a head-butt at Magpies defender Mathieu Debuchy before later completing the win with the Swans' third goal.
The midfielder had also earlier played a key role in his side's second, when his run ended with the ball ricocheting back off Debuchy and into the net, but it was his altercation with the Frenchman that was the talking point afterwards.
Asked if he had head-butted Debuchy, Shelvey told BT Sport: "That's what you think. Nowadays you can't do anything.
"I was trying to move to get out of the way. That's life at the end of the day."
Newcastle boss Alan Pardew was certain he should have seen red, though,. saying: "He shouldn't be on the pitch to score a third."
Pardew was also annoyed that his side, who were outplayed for large parts, were denied two penalty claims.
Ben Davies appeared to stop a goal-bound Loic Remy shot with his hand while the striker went down under pressure in his own box before Shelvey broke forward for his side's second.
Alan Pardew: "I'm still waiting for an explanation.
"The ball was going in the net and he (Davies) stuck an arm out. All our players have reacted. From the second they went up and scored. I'm aggrieved about the decisions.
"In all honesty though Swansea played terrific and we weren't good enough to cope at times. In the second half we pushed and when you push you need decisions to got your way - we've had two decisions go against us."
IDEAL FOR CHRISTMAS
MAGPIES IN EUROPE -
HARVEY TO PARDEW
Although NUFC are not talking to the Chronicle or Sunday Sun ... we are!
And the full story is expected to be in newspapers this week.
The official new title is "Magpies In Europe - Harvey To Pardew" and is an up-dated version of "From Antwerp To Zurich" - which includes the 14 Europa League fixtures we played last season.
The 280-page book features match reports from the 134 European matches Newcastle United have played, starting with the memorable 4-0 win over Feyenoord in 1968 on our European debut.
Included are stats and the figures you would expect, but also each away fixture has the remarkable experiences of individuals who travelled to watch the matches.
Introduction by "Big Bad" John McNamee, part of the Fairs Cup winning team of 1969.
It is a fascinating history that every Newcastle United fan will enjoy.
And with a limited print-run, make sure you order a copy.
Mail order: Send a cheque for £10.45 made payable to K.Fletcher to:
K Fletcher, 5 Dunelm, Sacriston, Durham DH7 6NU
Include your own address.
ON SALE NOW AT:
M&M City News; 140 Northumberland St, Newcastle NE1 7DQ.
The Flower Shop, Spennymoor, Co Durham.
RRP: £10.95
if you want to order, contact us:- Kevnumad@fsmail.net
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NEWCASTLE UNITED 2013/14
PREMIER LEAGUE
SWANSEA 3 NEWCASTLE 0
Krul, Debuchy, Williamson (77' Yanga-Mbiwa), Coloccini, Santon (56' Haidara), Sissoko, Tiote, Cabaye, Gouffran, Shola Ameobi (67' Obertan), Remy
Subs: Anita, Elliot, Sammy Ameobi, Dummett
NEWCASTLE 2 WBA 1 (Gouffran, Sissoko)
Krul, Debuchy, Williamson, Coloccini, Santon, Sissoko (90+5' Cisse), Tiote, Cabaye, Gouffran, Shola Ameobi, Remy (84' Anita)
Subs: Ben Arfa, Yanga-Mbiwa, Elliot, Obertan, Sammy Ameobi
NEWCASTLE 2 NORWICH CITY 1 (Remy, Gouffran)
Krul, Yanga-Mbiwa, Williamson, Coloccini, Santon, Sissoko, Tiote, Cabaye (68' Anita), Gouffran (83' Ben Arfa), Shola Ameobi (74' Cisse), Remy.
Subs: Haidara, Elliot, Obertan, Sammy Ameobi
TOTTENHAM 0 NEWCASTLE UTD 1 (Remy)
Krul, Debuchy, Williamson, Yanga-Mbiwa, Santon, Sissoko, Cabaye, Tiote, Gouffran (85' Obertan), Remy (75' Cisse), Shola Ameobi (60' Anita).
Subs: Coloccini, Ben Arfa, Elliot, Sammy Ameobi
NEWCASTLE UTD 2 CHELSEA 0 (Gouffran, Remy)
Krul, Debuchy, Williamson, Yanga-Mbiwa, Santon, Sissoko, Cabaye, Tiote (53' Anita), Gouffran (85' Obertan), Shola Ameobi (62' Cisse).
Subs: Ben Arfa, Elliot, Sammy Ameobi, Tavernier.
SUNDERLAND 2 NEWCASTLE 1 (Debuchy)
Krul, Debuchy, Williamson, Dummett, Santon, Sissoko (45' Cisse), Tiote, Cabaye, Gouffran (86' Sammy Ameobi), Ben Arfa, Remy (70' Shola Ameobi).
Subs: Anita, Haidara, Elliot, Obertan.
NEWCASTLE UTD 2 LIVERPOOL 2 (Cabaye, Dummett)
Krul, Debuchy, Williamson, Yanga-Mbiwa, Santon, Cabaye (78' Sammy Ameobi), Tiote, Gouffran, Sissoko (45' Dummett), Remy, Ben Arfa (78' Anita).
Subs: Cisse, Elliot, Obertan, Dummett.
CARDIFF CITY 1 NEWCASTLE 2 (Remy 2)
Krul, Debuchy, Williamson, Coloccini, Santon, Tiote, Cabaye (86' Ben Arfa), Gouffran, Sissoko, Remy (71' Gutierrez), Cisse
Subs: Anita, Yanga-Mbiwa, Elliot, Sammy Ameobi, Dummett
EVERTON 3 NEWCASTLE 2 (Cabaye, Remy)
Krul, Debuchy, Yanga-Mbiwa (46' Williamson), Coloccini, Santon, Tiote, Anita (69' Cisse), Ben Arfa (46' Cabaye), Sissoko, Gouffran, Remy
Subs: Elliot, Obertan, Sammy Ameobi, Dummett
NEWCASTLE 2 HULL CITY 3 (Remy 2)
Krul, Debuchy (86' Tiote), Yanga-Mbiwa, Coloccini, Santon, Cabaye (62' Gouffran), Anita, Sissoko, Ben Arfa, Cisse (73' Marveaux), Remy
Subs: Williamson, Elliot, Sammy Ameobi, Dummett
ASTON VILLA 1 NEWCASTLE 2 (Ben Arfra, Gouffran)
Krul, Debuchy, Coloccini, Yanga-Mbiwa, Santon, Anita (74' Tiote), Cabaye (88' Sammy Ameobi), Ben Arfa, Sissoko, Remy (63' Gouffran), Cisse
Subs: Elliot, Marveaux, S Taylor, Dummett
NEWCASTLE 1 FULHAM 0 (Ben Arfa)
Krul, Debuchy, Yanga-Mbiwa, Coloccini, Santon, Ben Arfa, Sissoko, Anita 65' (Cabaye), Marveaux 74' (Remy), Shola Ameobi 65' (Gouffran), Cisse
Subs: Gosling, Elliot, Sammy Ameobi, Dummett
NEWCASTLE 0 WEST HAM 0
Krul, Debuchy, Yanga-Mbiwa, Coloccini, Santon, Ben Arfa, Sissoko, Anita, Marveaux 66' (Sammy Ameobi), Shola Ameobi, Cisse 72'
Subs: Gosling, Bigirimana, Elliot, Vuckic, Dummett
MAN CITY 4 NEWCASTLE 0
Krul, Debuchy, Coloccini, S Taylor, Yanga-Mbiwa, Sissoko, Tiote, Gouffran 45+4' (Dummett), Ben Arfa 65' (Sammy Ameobi), Gutierrez 44' (Anita), Cisse
Subs: Elliot, Marveaux, Shola Ameobi, Obertan
LEAGUE CUP
NEWCASTLE 0 MAN CITY 2 (AET)
Krul, Debuchy, Williamson, Yanga-Mbiwa, Haidara (45 Dummett, 80 Ben Arfa), Anita, Tiote, Gouffran, Sissoko, Shola Ameobi (66 Cabaye), Cisse
Subs: Remy, Elliot, Obertan, Sammy Ameobi
NEWCASTLE 2 LEEDS UTD 0 (Cisse, Gouffran)
Krul, Debuchy, Williamson, Coloccini, Dummett, Gouffran (90' Vuckic), Anita (80' Gosling), Tiote, Marveaux, Sammy Ameobi, Cisse (71' Obertan).
Subs: Ben Arfa, Yanga-Mbiwa, Bigirimana, Alnwick
MORECAMBE 0 NEWCASTLE 2 (Shola Ameobi, Sammy Ameobi)
Elliot, Debuchy, Yanga-Mbiwa, Good, Dummett, Bigirimana, Gosling, Marveaux 88' (Sissoko), Vuckic 46' (Shola Ameobi), Sammy Ameobi, Gouffran 71' (Ben Arfa)
Subs: Santon, Anita, Alnwick, Streete
Newcastle United Fixtures
Saturday December 7
12:45 Premier League
Man Utd v Newcastle United
Saturday December 14
15:00 Premier League
Newcastle United v Southampton
Saturday December 21
15:00 Premier League
Crystal Palace v Newcastle United
Thursday December 26
15:00 Premier League
Newcastle United v Stoke City
Sunday December 29
13:30 Premier League
Newcastle United v Arsenal
Wednesday January 1 2014
15:00 Premier League
West Brom v Newcastle United