(Edited because I did not notice 4 callers on the flop).
Interesting hand. I think the mistake you made was not betting enough on the flop. That is a flop where you are very likely to have the best hand, but it has many drawing possibilities. With 4 people in, I think you need to bet the pot, or perhaps a little more, to establish your hand and try to take it down right there. I probably would have fired 150 or so. Your move on the turn was probably overly agressive considering the 4 callers. With 4 callers, good chance one is slowplaying a set. Based on his call on the turn, I would probably put him on a set. I probably would have just bet another 150 or so on the turn, if not check, then check folded the river. How did it turn out?