Last week I went to the dentist to have a couple of teeth extracted to make some room in my mouth. They pulled two out and sent me home to recover, and then had me come back two days later to have two others pulled out from the right side of my face. It's a week later and the right side of my face is in no pain and doesn't hurt, but on the left side of my face (these are the two teeth that were taken out first) the bottom of my jaw (below the tooth they pulled out) is sore and feels swollen. I'm a bit concerned because this is on the side of my face where I had my first teeth pulled out, so I would think it would've healed first (the other side of my face is in no pain). Should I be worried that I have an infection of some kind, or is this just normal? If it helps, when my dentist pulled on my bottom tooth on the left side of my face he said it was twice the size in diameter when compared to other teeth.

I've been rinsing my mouth with warm water and salt, but the pain remains. I take Advil but it only helps for a while.