I was diagnosed with endometriosis over a year ago. I've had the surgery and been put on hormone tablets and been kept on cerazette. With cerazette I went a year with no periods but recently I've been having periods every week and they last about 3 to 4 days. They always start on a Sunday and the blood is extremely black and wet looking. It also still hurts during sex. I'm not too sure what to do as the specialist said they got rid of all the endometriosis. Is there a chance that it could of grown back? Any comments would be greatly appreciated.