bad UTG limp.... after?

[PSW]

PokerStars 1/2 Hold'em (9 handed) converter
Hero is a bit on tilt and "a little pregnant." After my limp, just how bad is my passive play? Spank me hard if necessary.

CO is 68/1.1/.33 after 89 hands

Preflop: Hero is UTG with T[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
Hero calls, <font color="#666666">4 folds</font>, CO calls, <font color="#666666">1 fold</font>, SB completes, BB checks.

Flop: (4 SB) A[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, Hero checks, <font color="#CC3333">CO bets</font>, SB folds, BB folds, Hero calls.

Turn: (3 BB) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, Hero calls.

River: (5 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets</font>, <font color="#CC3333">Hero raises</font>, CO ...

Final Pot: 9 BB