The swelling on the fallopian tube
could be due to infection or endometriosis; at your age you should also be evaluated for other pathology. The histopathological study of the operated specimen can be the only conclusive opinion, correlated with your clinical findings. It is difficult to say anything now without any further information. You may also need follow up reviews. Take nutritional supplements, maintain a healthy weight and proper exercise (after you recover). Contact your doctor for further advice. Wish you good health.