When to get your IVF meds?

Erial
I'm starting BC on day 2 of my cycle, so in about 2 weeks. I'll be on it for another 2 weeks. When should I start getting my medications for our <a href="https://glowing.com/glow-fertility-program">IVF</a>? Insurance doesn't cover anything so it'll have to be out of pocket and through any discount programs we can find. So far we have freedom pharmacy.  
Thank you !