Well i think it's fustrating not knowing what is wrong. For a while now one week after my period is finished it comes again for one day it would come heavy at first and the it fades away. Once my doctor said if i had sex after my period it would cause the reaiming blood to come down. I have had xray, test the works. She says i am fine but i am worried. I am 23 never even had a child yet. Brother the things women go through.