Did my plan b work?

I had sex exactly a week after my period without a condom for the first half and a condom for the second half. He didn’t cum in me nor cum early on the day by himself. He probably did pre cum in me but we aren’t so sure. I took my plan b pill the second day of the time frame and only experienced cramping that one day. Many people told me that when you take the pill it will make you bleed soon some days after but I haven’t. I’m kinda scared that my pill didn’t work... I don’t wanna have a kid yet