TTC and Irregular

Michelle • Nanny, Paramedic and Dog Rescuer!
Is anyone trying to conceive and irregular with their periods? I've been off birth control for 9 months now and it took me 5 months to even get my period. I'm super irregular. And we decided we're ready. I did one month of opk and I cried because I never got my surge. I took it randomly last week after missing my predicted period... And I had a surge. Anyone else have random unpredictable surges?