ITM with AJs

[Uppercut]

Pokerstars $10+1 SnG

3 of us left, with blinds of 100/200 (chip counts are approximate)

Button ~6,500
SB ~5,000
BB (Hero) ~2,000

Both button and SB are fairly aggressive

Dealt to hero: Ad Jd

Action as follows:
Button bets 200
SB raises to 800
Hero...??????