Jackson did get a tooth pulled out

I can't believe it. I feel so awful for my poor baby. I mean, he's been absolutely fine today, eating crunchy food, etc. But I finally got a chance to look in his mouth while he was sleeping. It's not one of the two front teeth, but it's one
next to the front tooth, on the right. It doesn't look infected or anything, just looks like... well, a tooth was pulled. I feel so awful though. He is due to get his rabies shot next week but do you think I should try and get him in this week so he can get the shot and the vet can look in his mouth?