Two periods a month?

Hey! I’ve been on the combine pill for about four months now. I take it daily but not always on the exact time. ( maybe few hours off) I had protected sex a month ago while on my period. I also recently had my period on the placebos about 14 days ago. Yesterday I started bleeding heavy and its only got worse. I full like I’m having a full on period with cramps and everything. Does anyone have any answers or any clue what could have caused this? Thank you so much!!