im playing at a no limit table where minimum buy in is 100 bucks. i have AK preflop and i bet 15 bucks, this guy after me raises double of what i bet, and so i call. on the flop, a King comes out, and two cards that i dont remember, and i bet big, he reraises me, so i re raise him by going all in. we flip over our cards and he has pocket kings. bad play by me? what should i do next time? it's hard to fold AK when a king comes out.