TTC on biirth control?

chey 🐝🌻 • Mommy to be 10/24/22 🤰🏼; Pregnant with PCOS. ✨
My boyfriend and I have been TTC with PCOS for almost a year and a half. I've had a lot of times where I thought I was but as it turns out like all the other times, I'm not. I went to the doctor about a month ago but I had very bad cramping and heavy bleeding and he put me on Provera to make my periods become more regular and then said I should take birth control to keep my periods regular. I'm almost through with my first pack of birth control. I want to have a baby so badly but I also don't want my period to get off track again. Should I stop birth control for a few weeks and try again and use preseed and if my period does come start birth control again? Or just keep taking the birth control?