On Tuesday I did my biggest swim ever. I was pulled frustratingly close to the GW bridge because that thing was just not getting any closer. On Wednesday I went for a nice easy swim in Laurel Lake. On Thursday I picked up a glass of water and suddenly it felt like I'd been stabbed in the shoulder. On Friday I felt a little tickle in my throat. I spent Saturday on the couch with a fever.
So maybe that swim took a little more out of me than I thought.