ReenHag and TurtleMom, thanks for the replies! I think I'm adjusting: I never felt like I had to run to the restroom today, and I drank 24 oz of water just during my morning classes. Last week was tough, though.
NSVs today: I put my pants on this morning, and they fastened without my having to fight with them! And when I bent over to touch my toes this afternoon--right after lunch at that; kindergarten and 1st grade both had "Head, Shoulders, Knees & Toes" as part of the lesson--I could do it, easily, and still breathe! I'm looking forward to my first WI on Thursday!