I played a lacrosse game yesterday, and i took a lot of xenadrine pills before the game. I had tons of energy, and dint feel any of pain in the normal places that i get it. I had so much energy that i lifted wite heavy back after the game. I woke up this morning, with a very sore shoulder, that had grown a lot over night, it was much more bulky, and was sore when i raised it parellel. But, whats very weird is that when i hold my shoulder parellel, and try to push where it hurts, it feels like solid muscle...any suggestions? thanks.