NL100: Set Gets Check-Reraised on Dry Board

[bigslicknuts]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 8 Players - (LegoPoker Hand History Converter)

SB: $115.70
BB: $15.55
UTG: $133.25
UTG+1: $58.80
MP1: $111.80
MP2: $32.20
CO: $97.50
Hero (BTN): $71.10

Preflop: Hero is dealt 4[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (8 Players)
2 folds, MP1 calls $1.00, MP2 folds, CO calls $1.00, Hero calls $1.00, SB calls $0.50, BB checks

Flop: ($5) 7[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/spade.gif[/img] (5 Players)
SB checks, BB checks, MP1 checks, <font color="red">CO bets $4.00</font>, <font color="red">Hero raises to $13.00</font>, <font color="red">SB raises to $22.00</font>, 3 folds, Hero ???

This is my first or second round at the table, no reads on villain. Do I check behind to get another turn bet? Do I go into calldown mode because of dry board? Do I just reraise and try to get it in here?