I have a 4 month baby boy and for the past 2 months i have gotten my period. Prior month period lasted about 2 weeks light spotting the whole time. I usually get them two weeks before the end of the month but november's period went to the beggining of december. So till this day i haven't gotten my period. I've been having period like symptoms (tired,very cranky,blotting, back pain etc..) Took a pregnancy test and it came back negative. Can anyone give me advice.