[NickyC]

I call in this spot, but I would have never checked 5th street. I would have put out like a half pot bet, then fold to a raise. Your check on 5th street just screams weakness, after betting the pot on 4th street. I can't see that 4 hitting anything that villian would not have bet on the flop. If he had a low wrap, I cannot believe he'd have checked on the flop. By checking 5th street, it screams you had a big draw and missed so villian is taking a shot at the pot.
I think you butchered this hand by not betting half the pot on 5th street, it just opened you up to being forced to make a tough decision. As it stands, I'd call anyway.