i am two weeks late almost three. i went to planned parenthood and took a pregnancy test and it came out negative. I had frequent urine infections and i been taking antibiotics for a while. when i had my last urine infection the dr. told me that i had a yeast infection and that was what was causing th urine infections. so i took them for eight daysbefore my period he also gave me some vaginal cremes. so i was supposed to get my period on november 17 and i didnt. its been two weeks after i went to planned parent hood and took the pht and it came out negative. they also gave a morning after that same day i took it. and now its been almost three weeks whats going on with me. might it be stress aswell im having final this week at school and i ve been getting an arguements with my bf alot. what can it be please help. i hope i am not pregnant, i wouldn't know what to do.