So lost on ovulation! Help?!

Kelly
Okay ladies, I am very confused. We have one child. I was told I wasn't ovulating at all, ever, 2 weeks before I found out I was pregnant. I didn't have a period for almost 5 months before I got pregnant. Now we really want child #2 and we are afraid the first was luck. How do I really know if I'm ovulating if I've never had a regular AF. I feel like the calendar can't be accurate on the app since there is no irregular setting (that I saw) and I have no idea (yet) the different phases of my cervix. Any extra clues and hints to get genre would be SOOOO appreciated! I'm lost and would really like to have some idea on how to add my next baby to our amazing family!