I hate my luck

This one goes into my “wins with small pots, loses with big ones” file. Did I do the right thing here? I think I did. He had 4 outs. So what’s that? A 16% chance? I was running well. I was up a significant amount. Now all of that progress is gone. Notice that he called with a straight draw and two overs for a whole buy-in. How much do I have to bet to chase away a draw?

Poker Stars, $0.10/$0.25 NL Hold’em Cash Game, 9 Players
LeggoPoker.com – Hand History Converter

UTG: $24.35

UTG+1: $20.10

Hero (UTG+2): $24.35

MP1: $31.95

MP2: $23.30

CO: $21.10

BTN: $27.30

SB: $20.65

BB: $13.20

Pre-Flop: J J dealt to Hero (UTG+2)

2 folds, Hero raises to $1, 2 folds, CO raises to $3, 3 folds, Hero calls $2

Flop: ($6.35) T J 9 (2 Players)

Hero checks, CO bets $5.50, Hero raises to $21.35 and is All-In, CO calls $12.60 and is All-In

Turn: ($42.55) 5 (2 Players – 1 is All-In)

River: ($42.55) K (2 Players – 1 is All-In)

Results: $42.55 Pot ($2.10 Rake)
Hero showed J J (three of a kind, Jacks) and LOST (-$21.10 NET)
CO showed Q A (a straight, Ten to Ace) and WON $40.45 (+$19.35 NET)