fold pre. What are you looking to hit to win the hand? And if you do get a good flop are they likely to pay you off when they limped in and a flop thats good for you is likely to miss them.

Also what stakes are we talking here and 6max or FR. What are the opponents stack sizes so that we can work out if you had the odds to call and draw to a straight now that you got a good flop. Having said that, this is where playing pre incorrectly sets you up to potentially lose a big pot. If you hit your straight someone may already have the flush,hit the flush and someone may have a better flush.