100 NL - I'm new to it...played it wrong?

[nickey009]

I had AA in early position. Blinds are .50/1.00 and I made the standard table raise to 3 bucks. I got 2 callers. Flop comes K 9 2 (2 spades). The pot is about 10 and I lead for 7 bucks. The guy directly to my left raises me to 25 and the other caller folds. It's 18 more to me.

I don't have much of a read but I don't think he'd be doing this with a flush draw. I thought maybe AK or KQ and he's trying to see where he is in the hand.

Anyway, I call with the intention of pushing any non-spade on the turn. The turn is an off suit 6 and he insta-calls with 99 for a flopped set. Am I going broke on this regardless? Could/Should I have gotten away from it?