I was supposed to drive dh to the train station tonight (night train for a morning meeting in Oslo). 10 minutes before we should have left, I had to back out. Vision disturbance like a circle of broken mirrors turning round and round, reflecting, difracting. Kind of pretty, actually, but unnerving. I've had this once before and knew it would become very distracting, so not a good idea to drive. I also figured it would take 20-30 minutes. Last time there was no pain. This time a headache followed. Not the worst headache I've known. The pain, at least so far, is not all that sharp or strong, more like somebody tightening a belt around my skull, tightness and pressure more than pain. So now what? Will there be more of these? Will they get progressively worse? What do you do if this happens while you're out on your bike? Oh well. I'm off to bed. Hopefully it'll be gone in the morning.