Back Pain

Patient: Hi,My back has been hurting from 2-3 weeks now. I have visited a couple of doctors and x-rayed my back. As far as I am concerned the doctors said that there is nothing wrong with my spine, bones or disk. My weight is 101.3 KG and My height is 179.5 CM. I am a 14 year old and I would like to know what i should do.