Starting clomid

kay 💛 • wife 💍 | dog mama 🐾♥️ | teacher of tiny humans 👩🏻‍🏫 | Diagnosed w/ PCOS June 2019 | Baby boy ♥️ 07.22.21

Hey y’all. I’m starting clomid this month on the third day of my cycle. I got my period tonight at 8 pm so do I count tonight or tomorrow as CD1? TIA!