25NL - 99 OOP OP 3 diamond flop - c-bet raised on the flop

[pena]

Ultimate Bet
No Limit Holdem Ring game
Blinds: $0.10./$0.25.
4 players
Converter (http://www.neildewhurst.com/hand-converter)

Stacks:

SB with $37.35.
Hero - BB with $27.66.


Pre-flop: (4 players) Hero is BB with 9/images/graemlins/diamond.gif 9/images/graemlins/spade.gif
UTG folds, Button calls, SB calls, <font color="#cc0000">Hero raises to $1</font>, Button calls, SB calls.

Flop: 4/images/graemlins/diamond.gif 3/images/graemlins/diamond.gif 2/images/graemlins/diamond.gif ($3, 3 players)
SB checks, <font color="#cc0000">Hero bets $2.5</font>, Button folds, <font color="#cc0000">SB raises to $10.5</font>

Opponent is unknown.

If I decide to make a move I should raise all-in, right? No point to call?
What would you do on this situation?

[the machine]

you cant just call here. you have no idea where you are in the hand. villain could have the nuts, or 2 overs with a FD making you even money, or a better overpair/set. we can pick a better spot and this is a fold