Emergency Contraceptive

Okay so this guy and I had sex. He never came idk why, I think he just had a lot on his mind that day he did seemed very stressed. Point of the story is I took a plan b due to not wearing a condom (I know I chastise myself everyday) neither am I on the pill (but looking into it). But has anyone had the side effects affect your period. Like making it super light but extremely long. Like it’s been a week but the blood barely makes a dot on my pad.