help anyoneee !! side effects ??

i took plan b about a month ago after unprotected sex. i took it within 24 hours and i wasn’t near my fertile window or ovulating yet. i got my period 5 days late. it’s been bright red and dark red throughout. the first day wasn’t bad, hardly had a flow. the second day was horrible, i had the heaviest flow and a lot of blood clots. but it slowed down as the day went on. the third wasn’t as bad but i still had a decent flow and again it slowed down as the day went on. the fourth day was light, the flow wasn’t too bad. and today it’s already going away. but i feel kinda light headed and weak with a faint headache. my boobs don’t hurt at all, i don’t feel bloated anymore, i haven’t had headaches, all i feel is lightheaded and weak. or is it just me overthinking everything and freaking out. i just want to know if this is normal ? i’m getting a little worried and scared. i know plan b can affect you but has anyone else had this before and been okay ?