PLAN B on period.

I am going to make this brief. I lost my virginity recently and relatively new to this stuff. What happened is that My friend wanted to have sex but didn’t have a condom and I was on my period. I wasn’t too comfortable with the idea but I thought WHATS the worst thing that can happen. He didn’t even last like 2 mins he pulled out and came on my bed. I was so nervous I took Plan B the next day and my period stopped. Then I had sex 3 times after. First time we finished with oral. Other times he finished with a condom in me. I had some light blood couple days ago and I have cramps a bit. My period is about 2 days late and I’m freaking out a lot. I don’t know what to do. Please someone answer.