Scenario: I have utg. I raise 3 times the BB. It's folded around to SB and BB who both call.

Flop comes:


It's checked around to me. I bet 1/3 the pot. SB calls. BB folds.

Turn:


Checked to me again. I bet 2/3 the pot. SB calls.

River:


SB quickly goes all in. I barely have him covered. I started the hand with around 8,500 chips. I'm down to about 3,000 at this point. I fold. You think he flopped the flush or called down with a 9 or Q and hit the boat on river? Should I have played it differently? All in on turn?