When to test

Keri

I am so new to all this we just really started to try by <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a> days. I got a positive opk on cycle day 17 which was on the 11th!

When is the best time to test? Or should I just wait and see if af doesnt come?