Welcome to PS. Unfortunately, I know what that feels like
I've always been a good speaker and never suffered nervousness when it came to work although I experienced it with social anxiety. I stayed away from social engagements for quite awhile until I was recommended treatment by my therapist. I underwent Cognitive Behavioral and Exposure Therapy which consisted of exercises in changing my thinking and developing coping skills. I was then incrementally put into situations where I could use those skills. It took some time but I am happy to say that I now function normally in any given social situation and in any environment. Additionally, I was prescribed benzodiazepines to help calm the anxiety.
I truly hope you and your Dr. can develop a treatment for you as left to fester, the increase in anxiety can prove debilitating. All the best to you. Let us know how you do . . . hugs