What Causes White Vaginal Discharge After Periods?

Hi my name is Ashley and im 5 3 and im 19 years old. i was wondering what the creamy/tan discharge could indicate, i had sex with my boyfriend may 4th of last month and then came on my period on the 5th of this month and lasted 5 as fairly regular and after i started getting cramps in my legs sort of a not getting serculation feeling but not uite more severe and abdominal area cramps still 4 days after period now a creamy/tan discharge what could this indicate?could this mean pregnancy, i heard something about higher potesterones?? PLEASE HELP !!!!!!!