odd one.

[vmacosta]

There was nothing wrong with going for a c/r on the flop. Hell, if you whiffed, you might even go for one again on a non-heart, non-3 turn!

But I'm pretty sure you made a mistake by folding the turn. The pot was starting to get big (5.5 BB?) and you still have 4 outs to if behind. And I don't think you're behind all that often since many good players will bet a pair of 3s in that spot (unraised pot, K83 flop, etc).