Hi, I agree with the possibility of ketosis. Unless you get other symptoms, you're probably OK.

If you get any other symptoms, it could also be an allergic reaction. I get that if I eat certain nuts, from my tongue swelling, but I get other symptoms later. Other symptoms would be stomach/intestinal cramps or trouble breathing/wheezing. In those cases, take Benadryl or, if more severe, get medical help quickly.

If you only have unusual taste and feeling like you have a sweater on your tongue, it's probably just ketosis, or a medicine or food you are ingesting. I'm going to see my MD this morning, so I can ask her.