100nl, bvb vs probable donk

[1gotth3nuts]

he's 33/7 through 30 hands so i guess he's a donk? no reads basically

Poker Stars, $0.50/$1 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

SB: $147.55
Hero (BB): $96
UTG: $157.85
CO: $137.50
BTN: $62.15

Pre-Flop: 6[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/spade.gif[/img] dealt to Hero (BB)
3 folds, SB calls $0.50, Hero checks

Flop: ($2) A[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, Hero checks

Turn: ($2) 4[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">SB bets $3</font>, <font color="red">Hero raises to $9</font>, <font color="red">SB raises to $18</font>, Hero calls $9

River: ($38) A[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets $22</font>, Hero

what should i do here? also what about my turn play?