It first started like somethin got inside ma back hence whenever I'm writin in class bowin down when I rise up it'll feel like somethin is stabbing me there..the pain back than was minor but now it has becomed a problem..it's like it has spreaded in ma whole back,my spine gets sore,I get massive headaches,I can't sit nicely for a long period of time,wheneve I cough my whole back itches(remember this pain is inside)..it has taken away my childhood hence I'm still 15 now I can't do much...the doctor has been giving me pills which I find useless since nothin changes,I went for an X-ray 3times it couldn't identify anything..I'm worried please help.