Weird taste in tongue. Of this taste?

I was detected with flu and was given medication for the same. 5 tablets in the morning and 5 at night. Don't know the names of the meds since it was from the doctors clinic itself. I have finished the 2 day course and though I still feel weak another problem that has risen is a weird taste in my tongue. It's unbearable. I can't taste anything because of it, even if I am thirsty drinking water is a task because of that horrible taste. I also gag a few times cuz of that weird feeling in my mouth. I don't know if it's the meds that has caused this but is there a solution to get rid of this taste? I have already tried tongue cleaning, brushing etc. There is no white residue on my tongue. Don't know where this weird taste is coming from. Please help.