Gaz,
The story of my life - consistent inconsistency. And I think that Ellie has a good point with the meds. I was forever up and down on the energy spectrum with no explaination. I have closets full of hobbies and projects that I started when I was hypo and have never been able to finish. Now that I'm stable on my meds, I'm slowing getting things on track and have a pretty average energy level and can be more consistent in myself and my career.
Hope you find some answers,
Putter