Hi ((((Bilbet)))) I'm sorry you may be dealing with a rectocele
I had a Stage III rectocele repaired at the same time as my hyst. Since I had 3 month wait between the day I scheduled my surgery and the actually day in the OR, my surgeon told me to be sure to try and avoid any unrequired lifting and straining, as both would make the prolapse worse... and harder to repair. As already mentionned, this includes keeping bowel movements regular and as soft as possible, in order to both avoid pressure and straining.
While it's not likely that you would be able to reverse an already existing prolapse, if your prolapse is in the early stages (stage I or early Stage II), you may be able to manage it with alternative therapy. A pressary comes to mind. Here's a link to our Prolapses Resources Library
where you'll find links to site specializing in prolapses.
One thing you may want to look into, is Pelvic Therapy. This is a method where biofeedback technology is used to both stimulate pelvic floor muscles and monitor the effectiveness of contractions. This is done by insurting a small probe in the vagina and, sometimes, in the rectum (don't worry: you purchase the probe). The probe is linked to a computer where the technician uses a special software to help you along. This is all complemented with "homeworks" where you have to do daily exercises in order to strengthten those muscles. I tried it in order to help with a pesky incontinence problem I've been dealing with since 11 months after my hyst and the progress was amazing: even after the 1st visit, there was marked improvement. And my insurance does cover the costs... but you need to include the original prescription with your first claim.