Welcome to JA - sorry you are going through this, let me opine.
First let me first tell you that this is concerning for an autoimmune arthritis like rheumatoid or lupus. Both of these can cause hair loss as well!
You should have the following done:1) HIV2) TSH For thyroid3) check for celiac disease (like thyroid can present with vague symptoms)4) ANA, CK, ESR, CRP.Another possiblity is fibromyalgia. If, and only if the above and a depression/anxiety/stress screening questionaaire are negative can the diagnosis of FM be made. For FM, I have found that many of my patients here at h-UCLA respond well to the following medicines:- Lyrica (pregablin)- Neurontin (gabapentin)- Cymbalta- Elavil.Thus If the workup for other causes is negative, I do recommend a discussion with your doctor about a trial of one of the above medications.Does this help?