Working on the pill

Hi guys! I’m a Stage Manager for theatre productions and I’m having a bit of a dilemma.

I’m working a show that has a scheduled run time of 8-11PM. Following resetting for top of show, notes, etc, I’m expecting to leave at 12-1 AM. I normally take my pill (combination) at 9 PM, but I know I’m probably going to be too busy to take it mid show and will forget if I leave it till after the show. Am I still safe if I take it around 7-7:30 PM? Can I go back to my 9 PM time after the show ends?