Swim Lesson #1: A swim diaper does not contain weewee as well as you might expect from something called "a diaper."
Swim Lesson #2: Bring an extra tshirt for yourself so you don't have to wear the urine-soaked one to work.
Swim Lesson #3: Being seven pounds below your prepregnancy weight does not mean your legs will ever look normal again. Some swimsuits have skirts. I should probably buy one. Tea length would be ideal.