strongly felt he had and A, but there was a flush...

[L8Bloomer]

He made a small blocking bet on the flop with a $4.75 pot. This is high enough to take away your odds to call the bet for a gutshot straight. You probably should have folded the flop.

His bet blocked you from making a higher bet, and it looks like he got what he wanted, a chance to see another club come up. When he reraises you on the turn, I would have been done with the hand. He hit his flush. NEXT!

If you were scared of the flush, why did you keep playing the hand? This is the kind of opportunity a player who is 50/0/4 loves.