cloudyworld, I too have the same sort of problem although not as severe as you describe. I feel fine thinking about an upcoming situation but when I get into it I fail miserably.

Are you on medications now? My doctor gave me Ativan which helped a lot with my problem. However we still need to figure out what your issue really is. Did your doctor give you any kind of diagnoses?

What do you mean by suggestion in your head? Did someone tell you that you would perform badly? Do you mean self-suggestion i.e. a thought you placed in your own mind?

It sounds like maybe you need to see a psychiatrist as well as your current psychologist.