Feeling better again, that was weird. Came home from the office and was wiped out by (what felt like) immune system response. I was hot, mildly confused, and aching so over. I slept for maybe 4 hours, got up, managed to get downstairs, lay on the sofa for another hour, and then just felt well again.

Two theories: I picked something up at work and my immune system did it's job, or I made myself sick at the idea of being in work. Hard to tell which it is.

Ah, well.