How To Cure Pain In The Side Of Head,nausea And Metallic Taste In Mouth?

I have had a bug for a few weeks. First the flu one week. Then cold with fever week two. Week three I am being treated for a chest infection. Now beginning of week four I feel off. I have a pain in the side of my head and the teeth on the same side. Metallic taste in my mouth. Lethargic. Nauseas.