Definately Pilates....worked for me and I had a terrible time with prolapse after DDs birth. The key is not just strengthening your pelvic floor with squeezes but ALSO strengthening your stomach muscles (they are all connected of course). I managed to get symptom free with lots of core strengthening. I am pregnant again and trying to be preventive by doing pregnancy pilates and yoga.

Keep at it....I think it's worth it!