NL50 BB with AQs facing raise from MP

[oliverm]

Villain is 31/18/3 after only 16 hands.
I've only played about 2000 hands at NL50 and was not sure whether I played this correctly..

Do we reraise preflop? (or fold?)
Do we check raise flop?
As played do we now call/raise/push/fold?

MP - $53.69
CO - $22.24
BUTTON - $49.96
SB - $96.21
HERO (BB) - $44.24
UTG - $2.50

Dealing [A [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/heart.gif[/img]] to HERO
UTG calls $0.50, MP raises to $2, 3 folds, HERO calls $2, 1 fold
Dealing Flop ($4.25) [Q [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/club.gif[/img]]
HERO bets $4, MP raises to $8.50, Hero...