I just started taking zemplar and I am a little scared beings its my kidneys I have terrible backaches and muscular spasms and also on GABAPENTIN CAP 100mg. After laying down and using a heating pad for about 30 minutes help and I can get up and do some housework or my gardening for about 1 to 2 hours before my back hurts again. Will this continue or will Zemplar help me? I guess I just scared...