Sorry to hear. I don't eat or can really taste ice cream anymore either. I think it has to do with the sugar, fruit, which I have a problem with tasting, and it's been like this for a while. It can become frustrating not being able to eat like you once did, but there are plenty of other food options, and ways to work around it, and basically trial and error to find out what you now like, but what you don't like today, doesn't mean you won't next week.
Good luck with the PET.
