I have had MS for 6 or so years now. I low TSH due to I had my thyroid out because I was running way to high and could not control it, I have very low vitamin D. I wa off my vitamin D med because the summer months sun gives me what I need. I was just tested agian because I have been exhausted and have has a lot off muscle and joint pain. I am thinking it has to due with my vitamin D, even though I have never had this much pain. In the past it has taken me about a month or so to get back on track with my RX vitamin D and feeling better. I know going for short walks and streching hep the pain. You know the saying (if you don't use it you lose it) It is the truth, just bare with it. If you don't feel better in at least 2 months, go back to you dr!