hi. im 28 yrs old. my boyfriend and i are planning to have our baby.. i consulted an ob and it was found that i have a retroverted uterus, in able for me to conceive she advised me to take fertility drug twice a day for 5 days beginning on the second day of my period. last friday, april 19,2013. before i take a shower, i noticed a blood spot on my underwear, so i thought that i will be having my period then. saturday morning when i woke up, i felt some cramping below my abdomen.. then i felt the urge to urinate to found out that theres blood on my undies.. i concluded that it was my period but then the sanitary pad wasnt soak at all with blood, it hasnt even filled the half of the sanitary pad. then come sunday, i woke up with only a little brownish discharge on the pad. i put again another one, but no blood flowed during that morning,, in the afternoon there it was again, a scanty blood stained on the pad. then the next morning, monday, no blood again and no discharge at all. it was all clear.. what does it mean? i consulted the ob about this, she advised me to have a pregnancy test, so i took the test but found negative,,im confused? it is possible that i am pregnant? i have a 28 cycle period..btw, we had intercourse during my fertile days. pllllllssss help