Hello, I have in the last wekk and a half been getting dizzy when I over exert, stretch or move my head too from one side to the other when laying down, I also have a dull headache as if a vice is being used constantly on it, then this morning I appear to have nasal drip down the back of my throat with a sour/metalic taste. I do have an appontment with my GP but this is not for 5 days, so was wondering if I need to make a quicker one?