I wouldn't jump to any conclusions. I have endometriosis and have been pregnant twice (once IVF, once naturally),but one episode of very bad period pain is probably more likely to do with your body recovering from the m/c rather than endometriosis. I would ask the specialist re. the ovary, or tube being larger than normal to see if it needs to be looked into further, but it may be nothing to worry about. Sorry to hear of your loss.