Irregular cycle ??

Ashlee-Louise
Been off birth control for nearly 4 months and taking folic acid and still haven't had my first period (had withdrawl bleed) I'm completely stuck on when I'm meant to be ovulating, I was irregular when I was 15 and started the pill because of this. Me and partner are really wanting a first baby but I feel like I'm just not working! What shall I do? Doctor isn't helping