Hello, I have gone through the query and understood your concern. With a twin pregnancy, all the pregnancy symptoms are exaggerated. This is because of the increased uterine size and as the pregnancy advances toward term, pressure effects are felt more. The edema can be relieved by using foot-end elevation while taking rest, avoiding prolonged standing/sitting and while lying down, trying to use the left lateral position as much as possible. The backache can be alleviated by providing some back support as this is mainly due to increased pressure on the spine. Take frequent small meals and plenty of liquids to maintain adequate nutritional balance. Get regular follow up and check blood pressure and hemoglobin levels constantly. Wish you safe motherhood.