That's good advice Jim!
When I had my DLA medical I didn't realise that -in fact I was just clueless. I tried to do all the things the doctor asked me to because I thought I had to. It made me so breathless and dizzy that she hurriedly told me to sit down again and took my pulse and BP! She seemed even more anxious than me!
At my IB PCA I was a lot more savvy -having found this wonderful site

When the doctor asked me to get up on the couch so he could examine me I said I couldn't -which was quite true - and he just accepted that and made a note of it.
I think you can sometimes feel helpless and as if you're a child that's got to do as you're told but that's not really the case, is it?