bleeding a week after plan b

rose

so i ended my period aug 11 and took plan b aug 15. today aug 21 i noticed blood on my panties but not exactly period blood. it was more milky and like discharge. i know plan b can make your period. one early and it has for me in the past but my period isn’t set to come for another 2 weeks. i’m not sure if it’s anything to worry about so i thought i’d reach out. anything would help:)