I think your flop play was a mistake and heres why. The problem with just calling on the flop is the pot is too big. Whenever you are thinking about slowplaying a hand by smooth calling versus raising, you must ask yourself "If I just call will anyone behind me have a profitable draw?" If the answer to this question is Yes, then you should not slowplay and instead raise right away. In this hand after you smooth called the flop, the CO,Button, and the SB were all getting 12-1 to call, which means if any of them have a gutshot draw they are now able to call profitably. You cannot allow anyone a profitable draw so you must raise the flop.

Side note: When someone has a set, a gutshot is a 14-1 underdog, since the gutshots are already getting 12-1 pot odds, they can call profitably becuz of implied odds they will get if they hit. So if the pot was a smaller size, like around 6-8 small bets, then smooth calling the flop has more merit, since no one can draw profitably behind you.