Pacific poker 1/2 levels.

all players are quite aggresive and know what they are doing:

I am in cut off with 120
Button has 200
SB has 240

I am dealt 55 and raise to 6.

Button and Sb both flat call

flop comes 3 4 5 with 2 clubs

SB raises to 18
I call
Button reraises to 59
SB folds
I reraised all in


thoughts?