oops. 5cd tournament misclick. now what?

[rchandra]

the bets are up to 600 / 1200 in the $4 Pokerstars Draw tournament. I have 1600, everybody covers.
I am UTG , the table pops up and I accidentally call 600 with JT762 (J72 spades) . Button limps (I've seen stuff from 88 to QQQ for his openlimps), SB calls, BB checks. Both blinds draw 3. I have not seen a pat bluff at this table. Should I try it or just draw 5? If I do pat and both blinds check, do I always make the bluff all-in or would it depend on how many cards button draws? If I draw 5 I think I need to call (or bet allin?) with KK+, maybe QQ. Comments?