PIO shots timing

Heather M • ttc #1 over 4 yrs, DOR, 2 angel babies, 6 failed IVF's, miracle baby born Oct'20

I'm wondering how exact the timing of the PIO shots have to be. We normally do them at 9:30pm. However we have tickets to a Broadway show Saturday night at 8pm. The show lasts until 9:40pm. We'd get home closer to 10 or 10:15pm. Do you think I can wait until we get home or should I bring it to do in the bathroom at the theater? Or should I inch up the time by 10 minutes each day to get closer to 10?