well i only was on depo for about 12 weeks. i only had one shot on august 25th and i started bleeding on october 25th and my doctor told me that that meant that the depo was out of my system. she also told me that i ovulate on the 14th day but i had unprotected sex numerous times before and after that. i had sex on the 12th day and she told me that sperm like live up to 72 hours. i was wonderin could i be pregnant???