Small Blind with 99

This was a hand from the 500K today (as best as I can remember). I actually got lucky, caught a set and more than tripled up, but am questioning the move. Note that we were in the money and it was going to be a while until that increased significantly. Also, no reads on either player.

Blinds at $750/$1500
My starting stack is $8250 ($7500 after the blind)

4 folds
Player with $23000 raises to $5000 (standard raise for the table)
1 Fold
Cutoff Raises all in (about $14000)
Button folds.

Is this an obvious fold for me and my 99? I ended up hitting a set and both players (TT for the original raiser, QQ for the CO) immediately started berating me (and of course PartyPoker) after the hand. Was this play that terrible?

Thanks.