Hi I'm 15 I have been bloated, constipated and I recently got lower back pain, I also feel nausea.. I looked up these symptoms and it showed pregnancy but I am not sexually active and I just had my period (it finished this morning). I have also been feeling anxious and tired, I'm not sure if it might be side affects from advil and tylenol I have been taking because I recently had a concussion or something else. I have a dr's appointment for about a week and a half from now but I just wanna know if its something not so bad so that i dont have to go to the dr because its on the other side of the city. Help anyone? Please