[SH] NL50 6m TT in 3b pot

$0.25/$0.50 No Limit Holdem
Prima
6 Players
Hand Conversion Powered by weaktight.com

Stacks:
UTG ($51.75) 104bb
UTG+1 ($61.05) 122bb
CO ($29.48) 59bb
BTN ($51.55) 103bb
SB ($51.78) 104bb
Hero (BB) ($143.12) 286bb

Pre-Flop: ($0.75, 6 players) Hero is BB T♦: T♣:
3 folds, BTN raises to $1.25, 1 fold, Hero raises to $4, BTN calls $2.75

Flop: 4♣: 7♦: 6♥: ($7, 2 players)
Hero bets $4, BTN raises to $10, Hero calls $6

Turn: K♦: ($23, 2 players)
Hero checks, BTN bets $13, $13 to Hero ($129.12)?

I don't know how should I play this vs an unknown regular. I didn't really had a plan with a call. I didn't know what turn cards can I call or not. Probably fold on the flop?