Welcome to the community here. There are quite a few threads here about anxiety, so you are not alone. It can be helpful to know that other people experience something very similar to yourself and it can be "normal" for many people.
You mentioned you had seen a psychologist. Did you find this helpful? Did they offer some coping skills and strategies to help with your anxiety?
When I have important phone calls, I try to have pen and paper with me so I can write down details, that helps me. I can look at my notes and ask the person to clarify what I am still not understanding.
I sometimes find it really awkward talking to people, so I ask them about themselves. Some people are very happy talking for ages about themselves.
It can be hard when we second guess everything and wonder what people are thinking about us. I try to put a smile on my face and that seems to help me feel more confident.
The Beyond Blue website has information on Anxiety as well that you may be interested in reading. I find the more I read about my mental health diagnosis, the better I understand it and can find ways to help myself as well, and to accept when I have not so good days.
Once again, I welcome you and hope you find your connection here beneficial.
Cheers from Dools