I'm with Lee. Put your money in.


But a further point. When you bet on the flop you should have already known what you were going to do when you were raised, called, etc. Your $50 bet was asking to be raised by the preflop raiser so you were going to reraise. Why not bet $100-$150, now when you are raised to $400-$500 you've made a bet that gives you some information and if you choose to reraise you can reraise allin or close to it and force your opponent to do the thinking.