One more thing.. You mentioned that you are having trouble with incontinence. This is definately related to child bearing and nerve disruption at the bottom of the bladder (directly above the vagina). That usually is resolved within a year.. SInce your difficulty has gone on for a longer then usual amount of healing time, you may want to consult with your physican.
Again, not to be inappropriate, but some Male GYN's do not appreciate the importance of your struggles and just 'blow you off' or discount your concerns as 'what do you expect lady, you had too babies.. <--they can very VERY insensitive.... if thats the case.. find a female GYN...they know and can relate on an emotional level
Use a great deal of caution if your considering surgery.. I've seem too many 'butcher jobs'. Its not worth it.