M.R.
And when was the last time you had a complete pelvic exam? Did your OB rule out a fistula, an opening, between the bladder and the vagina? And your bladder is in the right position? have you seen a female Urologist?
I'm just so sorry to hear this for you. You have a lot of years left raising kids. And then grand kids...you want to be more in control of your urine output than the current capacity.
Have you tried using Depends? The newer models are so slim you cannot tell the difference under clothes. From what I hear. I don't know personally - yet.
Please see a specialist. GL!