NL25: Lucky TP from the BB

[Specialwon]

I'm trying to level up from NL10, this was my first 15 mins at this table and I was feeling a bit trigger happy. No reads at all. What do I do with this river, and how badly did I play this up to then?

Party Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 10 Players - (LegoPoker HH Converter)

SB: $3.40
<font color="black">Hero (BB): $26.70</font>
UTG: $4.90
UTG+1: $18.80
UTG+2: $4.65
MP1: $27.50
MP2: $22.50
MP3: $8.90
CO: $34.74
BTN: $28.50

<font color="black">Preflop:</font> Hero is dealt J[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/heart.gif[/img] (10 Players)
6 folds, CO calls $0.25, BTN folds, SB calls $0.15, Hero checks

<font color="black">Flop:</font> ($0.75) J[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] (3 Players)
<font color="red">SB bets $0.25</font>, <font color="red">Hero raises to $0.75</font>, <font color="red">CO raises to $1.25</font>, SB folds, Hero calls $0.50

<font color="black">Turn:</font> ($3.50) Q[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $2.00</font>, <font color="red">Hero raises to $5.50</font>, CO calls $3.50

<font color="black">River:</font> ($14.50) 9[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero ????</font>