SnG level 2 (blinds 10/20) (Absolute Poker) (8 handed)

I am under the Gun with Qd Qs I raise to 100, next to act folds, next 2 players call, next folds (disconnected), SB folds, BB calls.

great i wanted to thin the field! should i bet more from early position with QQ?

Flop comes 9c 6c 3h, i think this is a pretty good flop untill BB bets 600 into the pot of slightly over 400, i am now unsure how to play the hand.

what should i do here? (i folded but do not like how i played this hand).