I am having a lot of pain, in my joints. Hands, ankles, hips and knees and back. I am stiff, extremely stiff after sitting or laying for a while. I am experiencing a lot of fatigue. I have been having a lot of off balance issues. Dropping stuff for no reasons sometimes. I have difficult staying asleep. I have recently noticed a nodule in my upper back near my shoulder. I have a lot of trouble raising up from a squating position. It is very painful squatting, and extremely difficult raising up. I sleep on a heating pad at night and sit with one at my back or on my hips when sitting. What does my symptoms suggest.