Too many hands here that you could be ahead of, I'd reraise all in and get all your chips in right then and there. I am going to assume sb had something like JA, and limper is on a flush draw here.

If you are up against a hand like 2 pair, you just need to have the board pair a card thats not his to jump ahead, and I am not going to give either player credit for a set here, they might have it, but if your read is right on limper, you are at least ahead of him and can get a side pot of about 4000 going with him and hope he doesn't hit a flush or have a set.

Tough luck on the loss.