This is more of a general question but I have a specific expample below. My normal play is to CB 2/3 to the full pot on the flop after the opponent checks. If I get called on the flop, however, and then the opponent checks on the turn again, I am really lost. What is the best general action if this happens. Do you fire again?

In this hand, I had no hand history with the opponent.

PokerRoom No-Limit Hold'em, $1 BB (6 handed) from (Format: FlopTurnRiver)

saw flop|saw showdown

BB ($48.75)
UTG ($42.20)
Hero ($51.80)
CO ($43.95)
Button ($19.00)
SB ($11.05)

Preflop: Hero is MP with Q, A.
1 fold, UTG calls $0.50, Hero raises to $2.5, 3 folds, UTG calls $2.

Flop: ($5.50) 8, 9, J (2 players)
UTG checks, Hero bets $4, UTG calls $4.

Turn: ($13.50) 9 (2 players)
UTG checks, Hero checks.
What is your move here?

River: ($13.50) 6 (2 players)
UTG bets $5, Hero folds.

Final Pot: $18.50

Thanks for the help.

this seems standard. don't try to make things happen too much.