Swelling after antibiotics

I went to the ER yesterday because I noticed that the right side of my face was slightly puffy and I had a minor toothache. I figured it was just a wisdom tooth growing in and pressing on a nerve, but my boyfriend said that it could be an infection and urged me to go to the ER. The doctor in the ER said that I have an abcess (abscess) beneath the wisdom tooth and prescribed me 500mg of Penicillin VK 4 times a day for two weeks along with Percocet. I have been on the antibiotics for over 30 hours and I know it can take up to 48 hours for them to start working, but the swelling has become much worse (to the point where I can barely open my mouth) and the pain is unbearable. Is this normal for it to get worse as the antibiotics kick in, or should I go back to the ER? Thank you in advance for any answers that you can provide me with.

[Jerome Tsang, DDS]

The ER may be able to help with the swelling by draining the abscess.  You need to see an oral surgeon and probably get that wisdom tooth out.