OverCards en flop con algunos draws

PokerStars - €0.02 NL FAST (6 max) - Holdem - 6 players

BTN: 106 BB (VPIP: 38.03, PFR: 14.18, 3Bet Preflop: 0.00, Hands: 151)
SB: 49 BB (VPIP: 27.96, PFR: 13.04, 3Bet Preflop: 0.00, Hands: 96)
BB: 46 BB (VPIP: 48.15, PFR: 11.11, 3Bet Preflop: 0.00, Hands: 27)
UTG: 137.5 BB (VPIP: 28.25, PFR: 6.52, 3Bet Preflop: 0.54, Hands: 557)
Hero (MP): 50 BB
CO: 109 BB (VPIP: 14.50, PFR: 11.65, 3Bet Preflop: 4.80, Hands: 7,063)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has K:club: A:diamond:

fold, Hero raises to 3.5 BB, fold, BTN calls 3.5 BB, fold, fold

Flop: (8.5 BB, 2 players) J:diamond: 3:heart: 9:heart:
Hero bets 5.5 BB, BTN calls 5.5 BB

Turn: (19.5 BB, 2 players) 3:spade:
Hero checks, BTN bets 10 BB, Hero ?¿?