Provera & Femara, CYCLE DAYS

Ok, so I’ve been taking provera to prepare a cycle for Femara. I’m currently on day 8 of provera. My cycle began on day 7 of provera I was instructed to continue take provera until day 10, with or without a bleed. So I was wondering if yesterday was considered CD 1 for me..?? I take Femara CD 3-7. I just wanted to know whether I could be on day 10 of provera but have to take Femara as well. Are they fine to take together for a day or 2? Or should I wait until I’m done with provera to begin Femara, considering that CD 1? I’m conflicted 🙄😩