Flopped flush draw and 2 overcards. Thought this was a pretty standard C-bet.

Very very wet board and I hit a flush. This is probably where I made a big mistake with my sizing. I bet half size pot to induce worse hands to call such as any straight draws, worse flush, one pairs etc. Maybe this deserved a full-size pot bet? I'm most likely ahead, only hands beating me area straight flush and the ace high flush. What do you think the re-raise is indication of? I figured it possibly put him on one of the trips: 66, 99, 55, 44. Other hands also include hitting the straight, but probably less likely. Also any Ace of spades with any other card. He may have also hit a lower flush such as with 10 9s, 8 7s, Q Js etc. A straight flush here is also possible for him to hold and to get more money in the pot. Would I ever fold or all-in here?

I thought that this was an obvious fold, all trips have hit their full house, ace of spades got there. It's possible I got bluffed and he only hit a straight or a worse flush, but I think this is a clear fold.