Getting an abscess is not definite. What I meant was that missing a shot from a pill increases the chance of getting one, due to the binders/fillers and whatnot that the pill contains. It is not a death sentence by any means, though.
If it does not improve, and it swollen, red, and warm to the touch, then that is a good indication of an abscess or infection forming. It is possible that it will get better on its own, although the worse case scenario would be your worst fear..
If it doesn't improve today please go to the ER. We cannot accurately diagnose you via the internet, so I don't want to tell you you will be okay and have something bad happen. You need a professional medical opinion, and the proper treatment if necessary.
It's better to be safe than sorry, especially when the worst case scenario is not good at all. I sincerely hope it turns out fine, but when you are playing with your health it is not smart to gamble.