Yes, I was very scared. Fear of the unknown, perfectionism etc etc. Poor teacher talking to me about it, it felt like I wanted a psychologist not a music teacher! But he was really understanding, and especially when I realised it only lasted 15 minutes, I decided I had to face my fears.
No such worries about the theory - I can cope with written exams where you're anonymous. It's the live performance that's stressful.
Still, I think I'll do grade 5 playing next year 