I am having a terrible back pain what can I do?!?!?

Just yesterday I got a terrible back pain. Its not like its on my backbone or anything, its kinda off to the side. Its on the top-right part of my back. Its not my shoulder or anything. Its hard to pinpoint the location the pain is coming from. It feels like a muscle or something is tied in a knot and it randomly gets tighter or with movement becomes more painful. I basically watched tv all day yesterday and used one of those heating pad things which gave temporary relief, but it is difficult to even get up for a snack or something. I woke up this morning hoping for it to feel better than yesterday but I think it just got worse. I've been taking plenty of advil and I'm using a heating pad but nothing seems to be helping. I work out for two hours every mon, wed, and fri morning, so it might be something to do with that, but to me this seems to be strange because I am only 14. My sister teases me for being a grandpa lol