after being up to ~14000 and losing a majority to the same villain about an orbit earlier, when he called a big bet on the flop when i hit top pair and he called to bust me with 2 pair on the river. jacks and sixes. he raised pre flop with jack six off. he had been calling everything, and pretty much catching. then this-

PokerStars No-Limit Hold'em Tourney, Big Blind is t600 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG+1 (t7200)
MP1 (t12550)
MP2 (t13225)
MP3 (t23500)
CO (t7725)
Button (t8485)
SB (t22100)
Hero (t6925)
UTG (t16215)

Preflop: Hero is BB with A, 5.
7 folds, SB completes, Hero checks. still a lil gun shy from the earlier beat

Flop: (t1200) 5, A, K (2 players)
SB checks, Hero bets t600, min bet to make it look like a steal....please raise SB calls t600.

Turn: (t2400) 6 (2 players)
SB checks, Hero bets t1200, SB raises to t8400, Hero....4525 left 2 pair...is he pushing because of the earlier beat? did he hit 2 pair? if so which two? trips?

how do you play it? what do you do?