Plan b side effects

sooo i am on the birth control pill. i believe it stopped ovulation from happening but when i had sex i didn’t know if i had ovulated or not and the condom busted. so i took a plan b... i had sex a good 3 or 4 days after my period had ended. i took plan b in the next 30 minutes now a week later i am discharging brown and cramping, i’m tired too. today i started bleeding light but i’m just wondering how long the symptoms will last and i’m expecting my period in the next 2 weeks coming from someone who has experienced this.. thanks lady’s