Did anyone get the number of that car?

I wish I knew what I did wrong yesterday so I can avoid it in the future. Whatever it was, it resulted in the first ever full-blown migraine attack since well over a year. I had almost forgotten what it felt like, too, so I didn't take the meds in time, didn't fall asleep until three, and woke up a few minutes after the book I needed to bring back before ten today started being late. Bugger.
Also, the weather is dismal, and the cat peed on the couch.
If that's any indication of how this week will be like, I'll be in bed with the covers over my head.