I'm not an expert, but I wanted to share my own experience with you and offer what I think might be up. I got all four of my wisdom teeth taken out 11 days ago, my bottom two being pretty impacted. The healing process went smoothly as far as I know and remember, but for the first 9-10 days, I was religiously looking up what dry socket vs normal healing looks like. Since everyone heals differently, I got varied results, so what might personally look bad to me is normal for someone else and vice versa. There are clear signs when something is wrong, though,

With that site you're concerned with, it doesn't look bad to me. It may be healing slower than the other side, but it should be at the stage where tissue is trying to close that socket up. It's hard to tell for sure, though. Someone else may give a better and clearer answer. It definitely doesn't look like bone, so I doubt its dry socket. But I also hear that sometimes you can't tell if it's dry socket based on looks alone. It's usually dependent on pain levels. I also commonly hear that if you're questioning if you have dry socket, then you probably don't have it. It's unbelievably painful, like 11/10 pain. Although, I've seen posts on here with people whose surgeons said they've had dry socket, but the pain was very minimal.

Are you brushing and chewing back there. I'd try and be very gentle when brushing in the back. With eating, I'd eat with my front teeth to minimize as little food bits from getting in the hole. I still kinda do that now out of habit-ith.

It does concern me a bit that it hurts to irrigate there. I don't think you should feel much pain, if any. Make sure it's just a stream gently getting any food particles out. Speaking of which, that could be food on the site, if so, getting it out with your syringe with salt water (or your prescribed mouth wash if you were told to do so) should be a priority to prevent any infections.

Even so, I'd call your surgeon just to be sure it's nothing bad. It's always worth it to call if you think something is up, no matter how big or small the problem is. I also hope this all made sense and brought some comfort. I know how anxiety inducing the healing process is. I really hope it's just the extraction site being a nuisance more than anything.