I believe this condition is called parosmia. I had a mild version for four years. It’s finally resolving (except shampoos and some sodas smell really strange)
It's strange how much these things are hard to discuss without the immediate context - I remember what it was like, but the translation without ready access is surprisingly challenging.
And since taste and smell are so closely related, I haven’t been able to drink colas for about 3 years. Dr Pepper is fine though, so I’m okay.