Confused my fertile window is weeks away

Renee • Loving my woman
I'm so confused my fertile window is weeks away and I've been off AF for a while. I've been taking provera to make it start. It didn't happen one month so I'm just wondering if my fertile window is correct or not. We have just been trying every day in case I could b ovulating. Don't really wanna buy ovulation kits for every day of the month.