Cycle buddy AF came 3/18/15

Jordan • I am 24 hubby is 26 we have one son who is 3 and a new baby girl born on 2-25-16!
Okay ladies hubby and I are trying for baby two! Last month AF was supposed to come 2/14 but was late and came 2/18 and didn't start ttc until 3/4 so I don't really remember if I ovulated or not tried to follow the chart/calendar and got a BFN. Kinda glad AF came yesterday so hopefully my cycle is now back on track! I've always had irregular periods and never can tell exactly the length of my cycle anyone else have these problems? Hubby is not into tracking ovulation and all he'd rather let it happen if it happens so having a cycle buddy would be helpful!!