Wow so glad I found this. I have a stomach disorder that causes acid and do sometimes get a horrible taste from that. However last couple of days it has been really bad. And the taste was different. I thought my stomach had gone totally bad and was panicking.
Then I read this - I ate home made pesto with LOTS of pine nuts in it two days ago! I first noticed it when I thought an avocado I was eating was off. I complained of the strong strange taste to my husband and he replied that the taste normal.
Some foods taste okay at the time of eating but then the taste comes back really really bad after I have eaten whereas other foods taste bad straight away.
The worst thing is this cordial we have - last night in bed I kept drinking it as I have also been really thirsty from this taste but it tasted so bad afterwards I thought it was off.
The only things that taste ok are things drowned in vinegar or salt! So oven chips have become a bit of a staple. I cant stand the taste of most fruit or anything sweet it makes the bitterness worse!
I hope to god this goes away soon as I already find it hard to eat properly due to my stomach issues and now food tastes dire. Lets hope it does go away after a week or so!