Why are my bitter taste buds on overdrive?

Food doesn’t taste bitter per se, but it seems that anything I ingest is making the bitter regions of my tongue go bonkers. It seems even when
I’m not eating I can taste bitter. It’s definitely my tongue, not stomach acid or whatever.

The only thing I can add is that my CPAP has been totally drying my mouth overnight. Not sure if that’s the cause.

Any ideas on how to get back to normal? This is mildly annoying and getting more so.