oh Vera, I completely know what you mean about being driven! I have a really hard time relaxing - every time I sit down I think of things that need doing...
But I have a big milestone to share - I went running for the first time this afternoon and it felt GREAT! I set low expectations and exceeded them - I ended up crossing over Southwark Bridge for about a 4.5km trip, but it was a very slow slog at ~30min. That's including a minute or two wait while the Beefeaters and Met Police held everybody back at the Tower for the cannons(!!) and military personnel to drive out the gate. Don't see that every day...
I know this'll sound funny contrasted with the above, but I've spoken to my boss and I'm going to start out at 4 days a week at the office because the full 5 these last two weeks was wiping me out physically and mentally and I was a zombie by the time I got home. So he's happy to let me be flexible and take Mondays when I have HOP appts and Wednesday when I don't (to have a break in the middle of the week) and come back to the full week when I'm ready. I've been really sinking my teeth into the big project now and using my brain again is refreshing.
A good side effect of walking to and from work (the bus is a pain, just as much effort, and way too crowded), is that the 6km/4mi round trip has taken off a few kg even in the last two weeks! So the scale says I'm only 3kg up now on where I was before I got sick, even though the inches are higher (I need to get back to lifting weights to lose some fat and put muscle back on, which is where the discrepancy lies). Clothes that I couldn't close at Christmas now fit nicely.

I'm going to wait until payday to ring up my gym and have them reinstate my membership, though (they very kindly halted it after receiving a letter from my consultant so I don't have to pay reactivation fees). It's a nice perk of being a long-time member of the council-owned gym (a bit like the YMCA in the States, I'd say). I think the free weights will really make a difference to my strength and stamina again.