Ok, I'm happy to report, I didn't go blind, this weekend, as I first thought. I was having a terrible time trying to even focus, let alone reading anything. Saturday, I was having difficulty, but thought it was just from being overly tired. I spent most of the day Sunday, being slothful and slept in most of the day. What time I was up, I wore my glasses. They have a really old prescription, so I can't see well out them anyway.
And then yesterday I was really starting to worry. Stuff that should have been no problem to read was extremely blurry. By the time I got home from work last night I had a major headache from straining so much.
Today, I am happy to report my blindness was only temporary and a result of stupidity. Apparently I switched my contacts in the case at some point so they were in the wrong eyes. Switched them back this morning and I can see again.