Did I play my 99 correctly?

[checkit888]

***** Hand History for Game 6065664583 *****
$15/$30 Party

I'm on the button with 9c9h

Villain in CO bets, I raise, SB 3bets, everyone calls.

** Dealing Flop ** [ 2s, Tc, 6h ]
SB bets, villain calls, I call.

** Dealing Turn ** [ 6d ]

SB bet, villain raises, I fold???

Was this a good fold, or did I give up this hand too easily? Should I have cap pf, or raise the flop?

I'm guessing SB had AK or small pair. I have no idea what villian has, maybe TT-QQ?