Win11 and Microphone

I have Win11 and the USB Blue Yeti Microphone.

I have the Microphone pluged into the back of my DeskTop Computer so it is going right into the Motherboard.

When I do a TeleHealth Video Call with my Doctor I plug my USB Camera that sits on my Monitor in the front of my DeskTop Computer.

Her never can Hear me and I can not Hear him but we can see one another.

So one time I unpluged my Blue Yeti Microphone and me and my Doctor could Hear one another.

So then I thought I do not have to unplug my Blue Yeti Microphone I will just turn it off but pushing the on off button on the Blue Yeti Microphone.

It worked my Doctor and me could Hear one another.

Then as we are talking the Audio cut out for both of us.

What is going on I know my USB Video Camera that sits on my Monitor has a Microphone.

Can anybody help?