Does radiotherapy cause brain fog?

Thanks @KarynJ. Yes - I also want to yell at people 'I've had cancer! I'm not the same workoholic me!'. But yes, not appropriate. Still, they're finding out now, as I'm learning to say no to things and taking time off on the week-ends. As an academic I have a very flexible schedule and work from home a couple of days a week, so I do get to have a nap, which is lovely. I've had a meeting with my boss and HR and am theoretically trying to scale back a bit, but it's hard. Thanks for your support.