Oh, that's rough! At least you've got medicine (and hidden it. Wow!).
It was halftime when I called in, so it was "quieter." Our rules for unscheduled PTO are that it's for any reason as long as you call in one hour prior to your shift. Before leaving the house seemed too early, and this way kept him from asking a lot of questions.
Sounded like they had fun with it until I got in.