Clomid days?!

Brianna • 26. Married. Happy. TTC #1. 1 miscarriage, 3 failed IUIs. Male factor infertility. Starting IVF Summer 2020. Foster mama.
What days do you take Clomid? I'm CD1 today and I've done two rounds of 50mg 3-7 with no luck. I'm thinking of trying CD2-6 but I'm not sure!!!