Two hands from today's session. I overbet the river both in and out of position and got nothing. What could I have got away with?

Paradise Poker No-Limit Hold'em, $0.10 BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG+1 ($9.52)
UTG+2 ($20.77)
MP1 ($26.00)
Hero ($25.13)
MP3 ($12.70)
CO ($24.50)
Button ($17.30)
SB ($29.85)
BB ($17.45)
UTG ($71.87)

Preflop: Hero is MP2 with Q, Q. SB posts a blind of $0.10.
UTG calls $0.25, 1 fold, UTG+2 calls $0.25, MP1 calls $0.25, Hero raises to $3, 4 folds, BB calls $2.75, UTG folds, UTG+2 folds, MP1 folds.

Flop: ($6.85) 8, 9, 3 (2 players)
BB bets $2, Hero calls $2.

Turn: ($10.85) Q (2 players)
BB bets $2.2, Hero calls $2.20.

River: ($15.25) 9 (2 players)
BB bets $5, Hero raises to $15, BB folds.

Final Pot: $35.25

Paradise Poker No-Limit Hold'em, $0.10 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($22.60)
Hero ($30.90)
UTG ($14.15)
UTG+1 ($20.12)
MP1 ($25.55)
MP2 ($37.25)
MP3 ($38.30)
CO ($22.75)
Button ($39.15)

Preflop: Hero is BB with J, J. SB posts a blind of $0.10.
4 folds, MP3 calls $0.25, CO raises to $1, Button calls $1, 1 fold, Hero raises to $3.1, MP3 folds, CO calls $2.25, Button calls $2.25.

Flop: ($10.10) 3, J, 5 (3 players)
Hero checks, CO checks, Button checks.

Turn: ($10.10) 2 (3 players)
Hero bets $3, CO calls $3, Button folds.

River: ($16.10) 7 (2 players)
Hero bets $15, CO folds.

Final Pot: $31.10