I Have Had A Childhood Filling Removed And A Root

I have had a childhood filling removed and a root canal in a tooth about 4-5 years ago...Everything was fine...However last year the tooth was bugging me...so like July it was checked out and then finally in like October I had a emergency situation where the tooth was oozing puss and so I went to a root canal specialist where he went to work on it...then was told to wait till Dec 2nd..to finish it which there was no problem in between that time except the allergic reaction to Clymedicin (Spell?) I haven't chewed on it and maybe my teeth bit together a few times...that side on the bottom have been sensitive to cold??? then a few days ago I noticed the gum line around that tooth and the one behind it and couple in front is very red and then my cheek has been swelling...

I started Monday night taking Tylonal 800 before bed and then again at like 1:09 In the afternoon...I keep gargling with salt water Ice pack it but..as time goes the Tylonal doesn't seem to be doing the work or anything else the pain is almost unbarable. Like the effects from the Tylonal only lasts like 3-4 hours..

I went to bed at 10:30 and its now 3:14 am and I slept like 1 1/2 hours...My cheek is more swollen and mouth is in pain...I am really concerned...P.S. My root canal specialist appointment is 2:30 this afternoon hope I make it...

Thank you for your patience and help!! Kimberly