Microphone suddenly fails on PC and phone

Sept 17 - Microphone, whether headset or earbuds, has worked fine since March, but suddenly on September 17, 2020, microphone fails on all browsers on both pc and phone. Cannot seem to restore function.

I am having the same issue repeatedly throughout my day. Happened 4 times yesterday - several times on 9/17 also and on my first meeting today. I am going to need to change providers if this is not corrected. Very difficult to do the work. In all instances, had to go to a back up way to communicate with patients.