A few days ago I was sitting in bed on my computer when I started experiencing what I can only call an electric taste in my mouth similar to putting a penny on one's tongue, or sucking on a battery.( primarily on the tip of my tongue and the back where the spit glands are but overall the whole mouth). At first it didn't seem to be a worry, something that was actually kinda interesting, but now it has been 3 days or so and I am still sensing it. I've tried drinking water, eating some salt, etc, but nothing seems to have much affect for more than a minute or so before it comes back. I also get a light light headed feeling, nothing that affects my sight or movement, but still a present feeling; as well as a slight nausea that comes and goes. Any one have any idea what this might be?