fold 2 pair here?

[chopchoi]

PP $5,000 free roll. 650 left, top 50 get paid. I have an average sized stack, of about 3,800 chips. I just moved to the table and have no reads. BB has a little more than 4,000 chips. Blinds 75/150.

J9o in SB. 2 limpers, I complete, BB checks.

Flop: J,T,9, rainbow. I bet the pot, BB pushes, the limpers fold.

I put him on the following range of hands:

a set, 2 pair (JT or J9), a straight, an oesd plus a pair (89, 8T, 8J, 9Q, TQ, JQ), or maybe just a gutshot plus a pair (K9, KT or KJ), or AJ.

What do I do?