Hi I was wondering you could help me, I have had a strange metallic taste in mouth (I already have good oral hygiene, brush, floss, mouthwash) for the past week and a half. But I ve had the following symptoms for a couple of months: underarm pain, upperarm pain, lower abdominal pain (it isn t constant, but they all occur frequently, at times simultaneously, at others times they occur on their own). sometimes I get a strange feeling of lightheaded and tingling in my head. And for the past two days, the left side of my throat has become very tender and it hurts alot when touched.. What s wrong with me? (Also, I was diagnosed as being borderline hypothyroid 2 and a half months ago I am on medication of 50mg levythroxine.)