What Causes Back Pain And Leg Cramps?

Help I CANNOT bend over and don t know whether I should try heat or more ice on the right side of my low back???? Initially I was in so much pain I could hardly get out of bed. After icing the right side of my low back during the night. I got up numerous times, with severe leg cramps throughout the night and could hardly get out of bed without them reoccurring with a vengence. (I take 720 mg magnesium. I am also on 2 tabs daily of CL 20 MEQ ER prescription potassium). Great difficulty putting my underwear, sox & pants because I can t bend over. Laid back in bed to pull up right knee (can t bend left knee due to an injury 8/8/16 [in physical therapy for a week for this]) to chest & then across to right side. I have spinal stenosis & 3 deteriorating cervical disks, a great deal of arthritis, all of my major joints including my jaw. This morning, simple tasks like unloading the dishwasher, getting laundry out of a front loader & into the dryer felt near impossible because I can t bend over. Twice daily I take 1000mg Turmeric Curcumin and 300mg Gabapentin.