Its about correct decisions. At this level of play your going to make way more continuing to play this hand over time. You played it correct. He caught his card this time. You did fine and its just one of those things you can't avoid based on the level of play at this stage of play. Some times over thinking this stuff can effect your game. Just keep playing it like this and you will come out ahead at this level. In a few hours after another tournament or two you wont think to much about it, and you shouldn't. He caught it and got lucky thats all there is to it.