Well, what a big baby...
I had the the MRI today and was surprised that I didn't find it claustrophobic. I was pleased I hadn't taken the valium the doc gave me.
The tunnel is bigger than I thought and although my head wasn't actually out of it, I could see the ceiling if I tilted my head back slightly (although I kept my eyes closed for most of it and almost fell asleep at one point despite the bangs and beeps).
They couldn't give me any idea of when I'd get the results. A couple of weeks perhaps?
Many thanks one and all for indulging my barely concealed panic and giving useful feedback and advice.