Ok, so I recently got on birth control (Depo Provera) on June 21-24 I was on my monthly cycle June 26 is the day I got on the Depo shot but on June 30 I had unprotected sex and my boyfriend did cum in me. Is it possible that I might be pregnant? If so how high is the possibility? I been feeling very nauseous weak stomach to the smell of food and having back pain.