Can Anyone Relate?

I am on a journey , unfortunately not a fun one, to help my daughter figure out what is going on either mentally and physically with her. It started last year, she is a vocal singer on stage and musical theatre performer. Has been since childhood with no issues ever with anxiety or panic attacks. She was performing on stage with an opera last year and she had an episode, her vision went out and she had other physical issues while she was singing. Since then she has daily issues with anxiety and pretty much even singing for one person sets her anxiety off bad. She has anxiety episodes while driving also, her daily life has greatly suffered. Her vision has not gone back to normal. My heart aches seeing her this way and she can’t pull out of depression at times. We have seen endocrinologist, neurologist, eye doctor, rheumatologist and obgyn . Only thing found is they say antibodies for hashimotos are high. She thinks it is boiled down to needing therapy to deal with the anxiety. Anyone else deal with similar? Any suggestions? Please help