This morning I got up with trepidation. Afraid that my dizziness would come back. It didn't.
I think my problem is that when I sleep on my back the infectious mucous collects and doesn't expel with coughing. Usually I cough up the mucous I've collected overnight. The day I was woke up very dizzy and nauseous, I wasn't coughing up any phlegm. Now I make sure to take the mucous thinning DM tablets. And to sleep on my right side.
Next Wednesday (August 22nd) is my first appointment with my ENT doctor. I'm going to try and tough it out until then.
I'm looking forward to going to work today and getting back to my regular routine.
Thank you everybody for your helpful comments and suggestions. I'll get through this latest medical challenge. Considering the alternative, I don't have a choice.