As somebody with an aquaintance with matters medical, I would say that you have a throat infection, but the taste you complain of could come from any number of sources. The throat, the stomach, or even from a dental problem. Please do see you G.P. and I am sure that a short coure of medication will solve this.
Too many people do not consult their doctors in the early stages of an infection and wait until the problem becomes acute. This is not to say that you problem has serious implications, but do have a consultation as soon as possible, for your comfort and your peace of mind, also, if your problem is infectious, well, you don't want to share it with you nearest and dearest do you? Make an appointment right now, before you even put the kettle on.