I had my daughter in December 2018, we want to have our next baby in February 2021, which means getting pregnant in May (hey, our anniversary!). Im currently taking progesterone only birth control. When should I stop taking birth control? I'd like to stop before May to see what my cycle will do, what's ideal?

Last time I stopped at the end of December 2017, got pregnant in February 2018, miscarried in March 2018b and then got pregnant 2 weeks later, still in March. But back then I was on normal birth control (sprintec)

Any thoughts?