I had this for a month or so during my first pregnancy, and now.it seems to be back. Minty things were not the answer for me since it just gave a minty ovetone to the bad taste. Sour hard candies helped a little bit. Whenever I could stomach it, eating garlicky or spicy foods actually helped the most - I think bc it gave me a real reason for my mouth to have an odd taste.
I also experienced many of my favorite things just tasting "wrong" to me. Coffee and chocolate were the worst. It really sucks, but it should go away.