Hi Steve208, I hope that this might reassure you ...
I started work for the Civil Service several years ago and experienced a similar situation with medical reports etc..
After my Doctor had returned her report, I started work.
I was asked to report to Occupational Health immediately, and went along feeling rather worried.
When I got there I was sat down with a very caring, kindly Occupational health person who asked how I was coping, and was there anything they could do to help me, did I want counselling etc..
I was completely and utterly bewildered by this kind offer, and thought perhaps they offered this to everyone.
It was only after half hour of 'supportive discussion' that I realised that she'd mis-read the date on the report, and still thought I was suffering from Post - Natal Depression - 15 years down the line!!
The Civil Service are generally incredibly supportive of their Staff ... so be honest with them and if they offer you support via Occupational Health, don't feel defensive! go for it. They were brilliant after I broke my Leg - helped me out loads!
Good luck,
Mort