Later: It turned out that I'd forgotten to take my nighttime melatonin. That explained a lot. I was able to go to sleep after I took that around 4:00 a.m. I got up a few times in the morning, and then up for the day around noon.
Mom and I made it to the library and Walmart. Those were successful trips. I stopped in at an optometrist's, and ended up making an appointment to go there on Monday.