BB seems pretty tight so far but only 30 hands.

I have $290
BB has $215

It seems whenever I call to reevaluate on the turn I get bet into and pretty much need to fold. Is folding to the minraise best?

No Limit Holdem Ring game
Blinds: $1/$2
5 players
Converter

Pre-flop: (4 players) Hero is Button with J K
UTG folds, CO folds, Hero raises to $7, SB calls, BB calls.

Flop: 2 T J ($21, 3 players)
SB checks, BB checks, Hero bets $20, SB folds, BB raises to $40, Hero ?