It sounds like at the time you had the hysteroscopy they must have ruled out endometriosis , and fibroids , or any infection , otherwise you would have been told . I think you are going to have to either hold out until your gp appointment , or seek medical help sooner . Remember that your blood loss may look more than it is so don't be too alarmed . If you change to producing large clots though , do get seen quicker . If your pain is too much to handle you may have to ring NHS Direct and get seen . All the best . x