Plan B - Spotting

So I had sex with condom on Saturday, one week ago. He came in the condom ( I saw when he pulled it out) but I was so nervous bc we were drunk so 50 hours later I took the Plan B Pill. I’m not taking another birth control pills. Today, 8 day after having sex, 5 days after taking the Plan B, I started bleeding. But it wasn’t like my period flow. It wasn’t heavy. I used 2 tampons. Is this normal? I’ve already read all the side effects of the pill, I just want to know there is no chance that I’m pregnant. Help please?. My period is supposed to come in 10 days but I know after taking the Plan B Pill it can come earlier or late than the usual.