Water tastes horrible

I am a 5'10" 17 year old female with a starting weight of 182 pounds.

Today is the 7th day of a 14 day water only fast. I am aware of the horrible taste that you get in your mouth during a fast, but I am unable to drink water without gagging because it tastes horrible. Is this normal? I also gained three pounds today. I don"t know if that is normal, but it seems odd to me.