OK, it's working perfectly again and I didn't do anything to it. I won't complain!
I guess my car just likes to throw temper tantrums on rainy days. The tach had quit, my wiper blade FLEW off in traffic, I thought the engine was about to drop dead at idle, and then all of my windows wouldn't defog except for two tiny circles on the windshield. Too funny. I can take a hint. (Thank goodness it's March.)