Does anybody else deal with a bad taste in their mouth?

The past few days I've awakened to having a bitter taste in my mouth. I know medication can cause this but I haven't had a medication change in several years. I do notice this seems to happen when my anxiety is very high. It usually takes a couple of hours after waking to subside.

Is anyone else dealing with this? Any suggestions on how to get rid of this? I know it's nothing serious but it really gets to me.

Thanks.