River bet too rich

[Nonfiction]

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (2 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero (t1240)
BB (t1760)

Preflop: Hero is Button with K, 9.
Hero raises to t60, BB calls t40.

Flop: (t120) K, 5, 7 (2 players)
BB checks, Hero checks.

Turn: (t120) 5 (2 players)
BB checks, Hero bets t60, BB raises to t320, Hero raises to t1160, BB calls t840.

River: (t2440) 2 (2 players)
BB checks, Hero bets t20 (All-In), BB folds.

Final Pot: t2460

From an 11.50 heads up match on stars, I thought I went all in on turn but had 20 chips left as Im drunk and was not really paying attention. Was so confused