10nl 6max: AJ on 8J4 flop against opponent I've been pushing around

[a nonymous]

$0.10 BB (5 handed)

UTG ($12.15)
MP ($15.90)
Hero ($23.80)
SB ($1.40)
BB ($12.05)

Preflop: Hero is Button with J/images/graemlins/diamond.gif, A/images/graemlins/diamond.gif.
<font color="#666666">1 fold</font>, MP calls $0.10, <font color="#CC3333">Hero raises to $0.5</font>, <font color="#666666">2 folds</font>, MP calls $0.40.

Flop: ($1.15) 8/images/graemlins/spade.gif, J/images/graemlins/heart.gif, 4/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
MP checks, Hero bets $0.90, MP raises to $3, Hero ?

I had raised him when he limped and continuation bet when called / beaten him out of a lot of pots, so I really felt he was playing back at me/not very strong here. My question is should I raise or call (based on my read, folding is absolutely not an option)? A draw is obviously likely on this board but again, read was that he could have air too. Do you like raising or calling here? Do I have to go broke no matter what hits on the turn if I decide to call (I assume so, what if it's the worst possible card which I guess would be the Q/images/graemlins/heart.gif)?

[Waingro]

If you really think he thinks you are FOS I really like a 3betai. He is going to look you up with any J or worse and feel compelled to call with his draw whatever. The fact is a lot of cards is tricky on the turn and it is not always easy to tell if he is still firing away with tpgk or he just hit one of his outs.