200NL six max
Hero QdQc btn $5
SB $20
BB folds
Hero $44
SB calls
Flop ($90) 9c 5d 8h
SB check
Hero checks

Turn ($90) 9c 5d 8h 6d
SB check
Hero checks

River ($90) 9c 5d 8h 6d Kd
SB ($392) bets $35
Hero ($227) calls

please destroy me here. I seem to get in my head about middling connected boards being bad for me, but I don't know what I am hoping for on turn or river or what to do if I get check raised.