The organs in the pelvis are supported by structures around them. Things like aging and childbirth can cause these structures to weaken. Loss of support lets pelvic organs fall out of their normal position. This is called prolapse. If the rectum falls out of place and bulges into the vagina, it's called rectocele. If the small intestine falls out of place and bulges into the vagina, it's called enterocele. Surgery can be done to fix these problems. This will help relieve your symptoms.
Pelvic floor muscle therapy is also required. This can strengthen pelvic floor muscles and help improve symptoms. A physical therapist or other health care provider can give you specific exercises to do.