Ovulation->AF

Hi everyone,
I have just started using an ovulation tester... as my cycle is irregular- anywhere from 28-37 days.
SO im just wondering if i will get my AF always 15 days AFTER i ovulated?
So this month i ovulated on day 21... does that mean AF will come day 36?

Hope this makes sense!
Thanks for you

I think its usually 12-15 days after. Try fertilityfriend.com as it too helps you to track your ovulation dates. I used it to get a rough idea of dates then used the pee stick tests for exact ovulation dates.

Good Luck

Not necessarily, it could come up to 7 days later. However, 15 days after ovulation is the perfect time to PEE ON THE STICK lol