Did I screw this hand up?

[defence18]

I'm playing .25/.50 on Full Tilt with 9 players. I get QsQh UTG and raise. 3 folds, 1 caller, 3 more folds, including SB, and BB reraises. I pop it again, and both players call. Flop is 8s 5c 4s. BB bets out and I call (afraid of either AA or KK from one of the players). Other player raises, and BB reraises. What do you do? Results in white:

<font color="white"> I wind up thinking for a bit, then mucking. The original raiser calls and is all in. BB shows 9h 4h for bottom pair and all in player shows Ah 8h. I was none too happy.</font>

Thanks.