($11) drawing from SB

Fold. You are not getting close to the odds you need to make this call, and if you miss your draw you are done. Leading out wouldn't be a great idea, since there are 3 players to act behind you who may have a made hand at this point. If you were to lead out though, push. Just check and fold this hand, and wait for a better spot to push the rest of your chips in there (which will have to be done soon preflop). If the blinds were a level or two higher, and you were in this exact situation with T550, I would start thinking about calling here. You original plan to c/r a small bet was not a bad idea, but this T300 reraise is the information that should tell you not to go through with it.