Whether they do or not you're still a thief. I doubt they will come looking for you unless someone at the story notices. Most thieves start out small and work up as they get cocky! Now is the time to pull you head out and change, unless you really like getting three hots and a flop in your future!
I agree with RetiredKop. A thief is a thief and stealing is wrong and doing it habitually will eventually end you up in jail or worse. I was talking with a friend once about someone who had stolen some insignificant item. I said "Why would someone become a thief for that?" My friend said "He was already a thief. He was just doing what thieves do." My friend was right. Stop now and you won't be a thief anymore. Everyone has done something wrong before but instead of worrying about getting caught why not have some integrity and just don't do it anymore.
Stop being paranoid and asking the same question. You're fine. No one's going to come looking for you. Cops have more important things to do than find a kid who did something dumb. But since you obviously can't handle the guilt, stay out of trouble, ok?