hi i been on depo from september 07 to june 08 came off until jan 09 i had my period the hole time i was off it. got a shot in january and was suppose to get the shot again in april but i didn't. in april i had some pink discharge when i went to the bathroom. I is now may 27 and i haven't had my period yet. i took a pregnancy test last week and it came back negative, is it possible i can be pregnant.