Hello Doctor, I have been experiencing moderate bleeding for what has been over three weeks now. Three weeks prior to the bleeding I was experiencing sharp pain on my right side below my abdomen. The pain was a sharp stabbing pain and continued for about three to four days before the bleeding began. I am on birth control, but do not take it everyday at the same time. When the bleeding did begin, I was having discomfort during sexual intercourse, and there was a tissue like substance coming out of my vagina. I am not sure exactly what this can be.