What taste is this?

My mouth had a very uneasy taste lately. It's not sour, not sweet, not salty but more like bitter. Is this what they called metal taste in the mouth? I thought metal taste like blood. Hehehehe... But I don't like this taste. It is so strong and make my tongue could not taste other food. And I will start to vomit (again and again and again). I have tried to eat many things to make this taste go away, but I failed. Asam masin also does not work, it make it worse. Anyone has any idea? HELP!