Hospital eye appointment today

I took annual leave - as I am still only doing a phased return to work - I didn't feel the Visual Fields test went well last week - and had to have an eye scan today - he now wants me to have a 'brain scan' - just to make sure what is happening to the optical nerve - I am pretty worried about it - but at least he seems thorough. I hope everything is OK. What with my leg and being back at work, already feeling low and tired - it just seems a bit much.