Three months ago I went to my doctor because I thought I was having an appendicitis but it turns out I had a ruptured cyst on my right ovary. I had my period a couple weeks after. The doctor told me to come after two cycles but I never got my second period or my third. I am on birth control and rarely have unprotected sex but when my boyfriend and I do, he has never ejaculated in me. I have also taken three pregnancy tests, one after the first missed period (negative), and two this past week after I didn't get my period for the second time (also negative). I haven't had any symptoms of pregnancy. Sometimes while I am running, I get almost unbearable pain on my left lower abdomen that spreads to the entire lower abdomen. Could I be pregnant? or what the hell is going on with my body???