what should i have done??

AKs AKo ... the raiser reraised...hmmm...I would probably fold. He has KK or AA. Or even a smal pair. Question is, are you willing to pay to play. if the extra dollars to see the flop doesn't hurt, then pay to see 3. If it doesn't hit you at all, dump the hand when he bets out. If he doesn't bet out, then it is either a trap hand or he's worried that his little pair is not good, depending what is on the board. AK is a great hand for me, I can get away from it in a heart beat. AA and KK are the hands that can't be dumped that easily. You will not get away from them. You have to play with those.