I smoke weed and my boyfriend ejaculates in me during sex. I am on depo-proveria, but I've been having really weird symptoms that are associated with pregnancy. Such as extreme stomach pain and cramping, nausea, extreme mood swings, varying appetite, fatigue, frequent bowel movements, headaches, and Sharp pain in my lower left ovary region. Also sometimes I experience sharp lower back pain. Could I be pregnant? What else could be causing these symptoms?