Why am I bleeding again?

Sara

I started taking progesterone in an oil form. Mid cycle, I started bleeding dark red blood consistently. I stopped taking the progesterone by day 4 of the bleeding, and after 6 days, the bleeding stopped. I had two days after that were uneventful, and now all of a sudden I’m bleeding again. I haven’t touched the progesterone since the 13th or 14th at the latest.