Some background. I had a TKR on my right knee in May. I need to have the left knee done as well. In between I fell landed on my shoulder, and had to have surgery in October to repair 3 torn tendons, a torn bicep muscle, and to remove a bone spur as well as arthritis from the clavicle. Still need to have the left knee replaced and now need to see a back and spine doctor for lumbar stenosis. I'm having low back pain and a cold sensation in my left thigh. Here is my Question. I got blood work results back yesterday saying that I have a severe vitamin D deficiency. My level was 11. Has anyone else had this issue? What supplements do you suggest? I am working on seeing the doctor, but thought it would be best to start taking something in the meantime. Also what symptoms did you have because of the vitamin D deficiency. I know fatigue is one, because I am tired all the time. Wondering about the others. Thank you for any suggestions!