1/2 NL live. Get pocket 99 in UTG. Limp in for $2. A MP player raises to $11, 3 guys call. I call too. $55 in the pot. Flop comes 2 4 7 with 2 diamonds. I want to see what the action is going to be so I check. The original raiser bets $20, gets 2 callers. Stacks are pretty deep all around. What do I do now?