Hi, i m 6 months postpartum, have yet to start my period and last saturday i had brown spotting, but nothing since. I ve been cramping and have off and on nausea since then. I thought it might just be my cycle returning, but nothing. I took a pregnancy test wednesday and it said negative. I guess my question is, if I am pregnant, when should I test positive? My husband and I don t use any sort of birth control.