knocked out w/ this hand...opinions please

[Mojo702]

Playing shorthanded w/ 6 and blinds at 1000/2000. I'm in the SB holding Ts9c. 2 callers, I call and BB checks. We take the flop 4 handed.

***FLOP***
[9s2s5c]
Seeing that I have top pair and a backdoor flush draw I bet out 2000. 1 caller

***TURN***
[9s2s5c]5d
Hmmm.....Caller could have 9 w/ better kicker, A2(?),A5(?),K5(?),55(probably would have raise me). I go all-in for 10K. Crap! He calls...he has me covered.

***RIVER***
[9s2s5c][5d]2h
He turns over the Kh5h for the full house.

Reviewing the play, I think I should have went all-in on the flop. Either way, with the other player getting a piece of the flop, he probably would have called anyways...