i gave birth on July 1st 2010.. had my Postpartun bleedin for 3 weeks im not breastfeeding. its now September no period.we startd to have sex 6 weeks after my delivery sometimes with out condoms. i went to my OBYN took a pregnancy test it was negative. The doctor told me she doesnt no why it hasnt come back. she gave me some pills so my period will come. But when i first got pregnant with my son i took a prenancy test it was negative then i took a blood test it was positive.. i dont want to take the pills that the doctor gave me to help my period to come if theres no blood test to prove that im not pregnant. COULD I BE PREGNANT??? Its now the middle of SEPTEMBER.. whats going on with me?