is this normal?!

Kailey • 22 / virgo / infj ig: @milklovinfiend
I had unprotected sex about 3 weeks ago with my boyfriend of over a year. I got worried so I took plan b roughly 20-22 hours later. I had mild abdominal pain and felt totally fine. I read that experiencing no side effects is completely normal for some and didn't worry too much. The next week, I started mildly cramping and spotted somewhat heavily and I guess light bleeding as well. Old blood along with a bit of fresh blood came out. That happened for about a week. My period was due Wednesday, and it's Thursday. I know plan b is supposed to mess up ones cycle a bit, but I'm worried. Should I count the spotting/light flow as a period? I felt kind of periodish. But I feel like my cycle is about to start but I'm not bleeding. I'm discharging, though. I usually have a bit of discharge a little after my period so that's why I'm thinking the spotting was it. I'm not sure and I'm mildly freaking out over this. Is this normal? Am I overreacting? (I'm in no place to be able to have a child and I really do not want one in all honesty.)