About 3 months ago I started running and the first time I was fine, it didn't hurt...maybe by the 5th time my leg started to hurt. It's not a regular muscle pain, that I can take...but more like a nerve..I mean it's a sharp pain...it comes from my groin but I feel it through out my whole leg. I don't run as often because I gotta wait for my legs to be fine again...which is like 2 weeks at least. I thought perhaps it was my sneakers because I don't have the proper running shoes but I'm not sure. Could it be my sneakers? they are just regular sneakers not running shoes. Or could it be adductor tendinitis? It's such a sharp pain that I can feel it even when I'm lying down or sitting...at first it felt like a pulled my back leg muscle..but i don't think so...the pain is almost as bad as a toothache. What could be wrong with me?