I get tired and have to nap in afternoon, back pain and muscle spasms at times, nauseous at times , ringing in ear at times and symptoms come and go some days and blurry vision too feel like light headed too --i m thinking like fibromylalgia or something--I am 66 yrs old just had vitamin D test they said it was 20 so i was give d3 to take every day and D2 a couple of times i was also given Metformin to take for weight loss and border line diabetic i guess i am wondering if it could be the meds too