Dpo question/highest peak days

I didn't take a ovulation test during my fertile window. Due to the fact that bills ate us up this month.

But we did make sure to have sex during my highest peak days, and we did the first two days, my 2nd 2 I was sick as a dog. And we couldn't after High peak days BC I was then hospitalized for a kidney infection. Any who!

If you don't know what day you ovulated. How would you count dpo/ count up to your period after baby dancing during the fertile window? My SO keeps asking Me how many days I am past ovulation and I keep telling him idk BC I didn't have an ovulation test. But we did go off of cervical mucus on the days it looked promising. I know that's a crappy idea to go off of but its all i could do. AF is due on the 15th, if that's any constellation.