Blood clot?

Christina

I’ve been on the pill for a long time now and am very adamant in taking it every night at 9:30. I took it late the past 2 days. I had sex 2 days ago (unprotected) for the first time in 3 months and just felt a huge blood clot/ discharge come out of me. It was brownish and smelt bloody. I should start the sugar pill on Sunday but I’m still worried. Should I be? What could it be? I’ve had some cramping this week too.