Sorry, that was a bit abrupt earlier, I was busy doing stuff and posting on my phone at the same time, but didn't want to lose your thread.
There have been a lot of other threads with good advice about exercising with prolapses (pre and post repair), if you do an advance search of prolapse and exercise, you will probably find some of them. Also, there is a brilliant private FB group called Pelvic Organ Prolapse Support (POPS) with ladies from all over the world sharing and supporting, professional women's health physios etc too. Walking and swimming would be a good place to start, and of course pelvic floor exercises. You will find it takes a while for your strength to build back up, but you are going to have to take a bit more care long term with lifestyle and exercise, avoiding really heavy lifting, pushing, pulling, and most high impact exercise, but a lot of forms of exercise can be modified to make them safer. Some strong core workouts can do more harm than good too, especially crunches, you need to build up the core muscles with pelvic safe exercise. If you google Michelle Kenway, she has lots of excellent advice on her blog, and a Youtube channel. Also, if you can run to it (it's an import), there's a DVD called Hab-it, which is specifically designed to strengthen core safely. Both Michelle and the HAb-it presenter are women's health physios.
Hope you continue to recover well, it is all a bit daunting and depressing at times, but I think it's worth sacrificing some lifestyle factors to avoid having to have further repairs.