[Goon2]

Raising pre-flop may have chased the 5s from the pot. Given the awakening on the turn and the number of players in the pot, someone has the straight. My guess is the BB.

Still, you're drawing to the nut flush. When the action is to you on the turn the first time, you're figuring to place a value bet (?). When the action comes to you the second time, the pot is laying 13.5:1 (it's late, please double check my numbers) and if you call, you can expect one more bet from the BB and two more from MP3. As a 4.75:1 dog to make the nuts, I think you should call (not raise) the turn.

But when you miss the flush on the river and are facing a raise and a reraise in front, you have to be very sure you're losing to a 5, or at least 2 pair. I think you definitely are. Fold.