Miscarriage and pregnant again?

two weeks ago i had got on the depo shot, and three days ago i had a miscarriage, and i ddnt kno i was pregnant, and now mi breast hurt as hell and im spottin evry now and then, my breast pains were vere strong today, and mi and mi boyfriend ben havin sex throughout wen i was pregnant and he released sperm inside of me alot. What's wrong wit me why am mi breast hurting and am i pregnant again please answer.