For about two years I've been dealing with symptoms that cycle - itchy skin (legs, abdomen, chest), rash (abdomen, chest), achy and stiff joints (mainly knees, hips, back, neck, wrists), blurry vision, low-grade fevers, extreme fatique. At first the symptoms would last for about a week, then leave for a couple weeks. As time goes on, there are less good days than there are bad days - typically 3-4 days of symptoms, then just general fatique and achiness for a couple days.
Blood work is all normal except for a small consistent amount of monoclonal protein. I do get frequent UTI's, have low blood pressure, and am low in potassium. A recent bone marrow biopsy showed no sign of cancer or development of myeloma. Years ago I was tested for lupus and the ANA came back indicating lupus, but since the symptoms were subtle at that time, they did not treat me for lupus. All tests since then come back negative for lupus.
Despite normal test results in re: to lupus, is it still a possibility, and is there a connection between lupus and monoclonal protein that can explain my symptoms? Also, are there other conditions that could cause these symptoms?
Thank you