@Georgelovesjumping thank you and you're very welcome. I'm far from being a medic of any sort but recognise fatigue, concentration and "arguing against it all" as part of my illness. Among friends and family much of last spring is lovingly referred to as Paul's mad period.
I would again encourage you to be open with and talk to those around you. For me talking about my illness was therapeutic and allowed people to understand where I was. A consequence was I got help from the most unexpected places. In one instance a friend approached me, quite unexpectedly, and gave me huge support. This has developed in to one of the best friendships of my life, perhaps the best. At 65 that's quite a thing.
None of this is your fault, do not be embarrassed, open up to people and you may well find, as I did, every cloud has a silver lining.
If you want to ask me anything just tag me in this thread.