I Don't Drink Enough Water. Trying But Since Monday I

I don't drink enough water. Trying but since Monday I had a strange metallic taste in my mouth so I drank 4 glasses of water that day for lunch. Trying each day to drink water. Chewed gum and some hard candy but the taste is not going away. I brushed my tongue, flossed and used mouth wash. It is already Thursday and same problem (metallic taste) Any suggestions/cures would be helpful.