Its down to 4 handed in my PL O8 SNG....Blinds 75/150 and I have 1200 left. Theres another short stack at around 1200 that Im trying to outlast because the other 2 guys are bigger stacks.

Im in the BB with [3h][9h][Qs] 2 big stacks limp, SB completes and I check.

Pot 600 Flop is [9s][9d]. This is a hand I need to get it all in with correct? I bet pot and got called by a big stack. The turn was a low card not making a flush and I put my last chips in. Good play?

Theres no low hand and I have trip 9s which has to be a pretty strong hand 4 way right? Not too mention that Im short and need to double up.

i think you have to do it and hope. You don't have chips to wait for a better opportunity that this.

is there a card missing for the flop?

I see 3 cards on the flop. Ts 9s and 9d. How many cards do you think come on the flop? :

I agree. You can't do anything here but your money in with (probably) the best of it.