Super Late Period or Pregnancy?

Ashuanti • “20” 🤗☺️ Baby boy arrived on 4/26/19 ❤️

This is a long story, but please bear with me lol...

So on the picture, the marker is on the first day of my last period, which was September 12. The week immediately after that was my fertile window. On the 24th of September, I had sex and the condom ripped. So I went and picked up a Plan B and took it. In addition to that, I started back on my birth control pill. Again on the 29th, which was after my ovulation period, I had sex again, but with a better condom. It has been 3 weeks ever since I had sex and over a month and a half ever since I had a cycle. But surprisingly, yesterday I was bleeding like a normal period, but for only 2 hours. After that, it stopped and never happened again. Then it started back up with light blood just a few minutes ago. I’m taking a rest tomorrow at Student Health. Is there a almost certain possibility I’m pregnant, or is my cycle just really out of wack?