Its my first time being on the Depo shot i did wait the seven days i was suppose to on the third week of being on the shot i had unprotected sex he did not ejaculate in me but i still have not had my period i only spotted for about six days after the intercourse was that my period? Or was that a side effect from the shot? And now i have been having back cramps and i feel bloated sometimes could there be a possibility i could be pregnant? Please help.