[aargh57]

If it's me I'm re-raising the flop. I don't think you can necessarily put anyone on AA or KK. While it's a possibility I think their range of hands are still pretty wide. AA,KK,QQ,JJ,TT,AK,AQ,AJ,AT,KQ, or even worse are possible. I could see UTG+1 betting out with many of these especially if he's got a backdoor flush/strt draw. I think raising to try and nock someone out is better as you may still win by spiking A or K. CO could be on a strt or flush draw also.

I raise the turn. Even if you don't count your overcards, you're only a 2.8 to one dog to make a hand with 12 outs and even if all 3 don't call, implied odds would probably make up for this. Of course, if UTG+1 re-raises and nocks the others out it's not so good but I think it's worth a raise here.

River fold is standard especially with CO calling.

One thing I would note is to not worry about your downswing when playing. If it's going to affect you, move down to a lower level or take a little break.