Is this gum recession due to wisdom teeth surgery?

So about 6 days ago I got all four of my wisdom teeth out. The one (missing) in the photo was only half out and according to the dentist I got a cavity between those two molars that's kinda hidden. I'm supposed to get that fixed in a week or so. Now, for the past few days the swelling has gone down a little bit and I noticed the gum is kinda off looking and red. It's literally the only area that's been hurting since I got the teeth out. What's happening there? Should I be worried?

So about 6 days ago I got all four of my wisdom teeth out. The one (missing) in the photo was only half out and according to the dentist I got a cavity between those two molars that's kinda hidden. I'm supposed to get that fixed in a week or so. Now, for the past few days the swelling has gone down a little bit and I noticed the gum is kinda off looking and red. It's literally the only area that's been hurting since I got the teeth out. What's happening there? Should I be worried?