QQ, vomiting to a flop raise, thoughts?

[ThePortuguee]

Party, 34k guaranteed, about 500 people left, blinds 75/150. I'm the big stack at the table with about 13,000, I get black Queens in Middle position.

UTG raises to 400 with about 1100 in front, I reraise to 1200, player behind me with about 9500 calls, folds to the original PF raiser to who puts his last 700 in.

On the flop the pot is about 3500, and the flop comes:

[4d 5h 7h] I bet 2000, and the guy behind me thinks for a while, then sticks his last 6300 or so into the pot. Im too busy vomiting to know what to do. Thoughts?