I would have bet less on the turn, probably mirrored my own flop bet with another $5. I like to do that often when a flush scare card hits. On the river I might bet another $5, or if I was comfortable that he wasn't very aggressive, just check to him. A lot of times if I don't really know where I am and the board is kind of intimidating, I'll just bet small amounts throughout until he either raises me or folds, or the hand ends.