Whats up with my wrist/back?

Well we recently got a punching bag and i love it, i use it almost daily (not recently cause my hand) but i do wrap my hands, and i also wear the gloves right. What caused it? Hitting to hard, bad form/posture, ect? And how can i accelerate the healing, because my wrist is killing me. Also, i was in track in 7th and 8th grade(gonna be a junior when school starts) and i messed my back up badly. Well here i am now a few years later and its worse, it hurts to move when im laying down, it hurts to get up, and lay down, and on really bad days it hurts to sit and stand! Whats wrong? Did i possibly fracture my back in track and still have problems from it?? Help appreciated!