Ovulating

Allison • 32 years old, I have a 6yr old and my bf and I are TTC.

I have no idea when I'm ovulating. I use the app and I have been keeping track of my periods in the notes section on my iPhone for a couple years. But it moves around so I don't get how to tell when I'm ovulating. My bf and I have been trying to conceive for 4 months. For example my periods have been:

Oct 3rd

Aug 30th

July 38th

June 21st

Help