Hi there! I was talking with a lady at our local Abbotsford Vitamin Center who seems to be very knowledgeable. We were discussing bowel spasms, caused by a prolapsed bowel, and she said some people also get bladder spasms for the same reason. All of this is caused by having babies, where everything gets pushed down and sometimes (quite often) stays there. I don't know if there is anything you can do about it, but you could talk to a doctor about it. They are sometimes helpful for diagnosis, at least!