I got off my BC on March 4th. I let the breakthrough bleeding come mimicking a period. I had my first natural period on April 9th... I am 99% sure I ovulated on April 30th (because of my cm,sex drive and cramping) and next period (based on the natural period in April) is due on Monday (May 14th).. is it possible that I am pregnant?

I heard that it can take several months for bc to leave your system but I got a normal natural period almost immediately. I don’t know what to think right now.