How long did you take BCP before IVF

JBo
I'm going to be taking 16 active pills before I stop.  I'm paranoid my period won't come for some reason.  It's stressful because I'm traveling abroad for <a href="https://glowing.com/glow-fertility-program">IVF</a> so timing is important.  How many days after you took your last active pill did you get your period?