Smart! I have MCTD and have had the tests, but comes out normal. Have had some success treating like fibromyalgia, which requires movement to keep pain at bay. Inflammation, fluids pressing against nerves is my take. A daily walk for generalized pain; PT for specific joints. I use KT (kinesiology) tape to isolate painful areas, lidocaine patches, ice/heat, epsom salt baths, accupressure point massage...haven't tried accupuncture yet. Compression socks make a difference for legs.