OK, I tried to call my counsellor but just got the answer phone. I don't do answer phones! So I sent her an email, basically with the worries and questions in my post here. Got a reply today which is helpful.
She had a request to call the mental health services waiting for her when she returned from holiday. She spoke to someone today about me and they have said I can phone them to discuss any concerns / worries. They can also arrange for the person I will see to call me and introduce themself before the appointment, and for them to meet me in receptiion. The second I am certainly going to go for; the first too if I can manage it with the complications of work and appointments. I am still very scared, but am starting to think this might be manageable.
Thank you everyone for your support and encouragement.
C