Plan B/Take Action question. Am I pregnant?

So after my fiancé and I had an oopsie, I took “Take Action” the morning after. While we had the oopsie, I was start/at the beginning of my period. However since everything happened and I took the pill, I have only been spotting old blood. I have only had fresh blood once and it was still SUPER light and spotting. This is NOT normal for my period. It has been about 5 days after the accident. Should I worry or should I wait it out and I’ll go back to normal. Feel free to ask any other questions if you think it’ll help. Thank you ladies!