This has progressed over the last 8-10 years. I started out with a autoimmune disease, No Dr. can figure what it was, then my back started with a very mild dull pain and over the years became chronic pain with a dull, cramping constant pain and spread from lower lumbar to thoracic. Then over time was accompanied by blurred vision, knee and joint pain, weakness in knee unable to put pressure on it and nothing makes my knee or back feel better. Also constipation and flutter of heart. periods of standing, sitting and exercising is still very painful for me. I wake up in pain and deal with pain all day long. No accidents, depression of any sort, Help? I cant function like this anymore. I take 10 mg flexural and 5/500 mg Percocet's. I try to exercise but it had become debilitating and I cannot stand up straight for both my back and knees have chronic pain. I also have two knots or bulges on my spine?