fertility clinic closed, starting ivf

starting <a href="https://glowing.com/glow-fertility-program">ivf</a> as soon, as I get my period, it was due today but of course its late. my clinic is closed on Sundays and I'm worried ill get my period Saturday.

my dr said I had to go in for baseline ultrasound and meds on day 2 of my period, who else started day 2 or day 3 of cycle??