today while I was on my bike ride I had just turned around to head home when i run over a STAPLE ... OF ALL THINGS lol, well the staple put a pinprick in my front tire,and soon I hear it letting go of air, well at the LBS I have a unlimted tube replacement along with a warranty/tune-up thing I got for $50 for 5 years, but that is ONLY tube replacement not inlcluding normal wear n tear on the tire, so can I just have them replace the tube and get away with it, or will it grow bigger and bigger anytime soon until I have to buy a new tire (I am 14 , just bought the bike, no money, and don't want to buy a tire if at all possible)