This kind of regret can lay waste to your psyche if you let it. And the worst part is that you don't want to let it, but it will weasel its way in, if the circumstances are right. I hope they're not, for your sake. As a result, the nerves can become temporarily numb," says Christina Munoz, assistant professor of pediatrics at the University of North Carolina. Because of this numbness, the nerves don't fire correctly so you don't always get the message that you need to go, and the muscles that keep you continent don't always get the message to hold it in. 16 months after I gave birth to my daughter, I had to wear a heavy duty sanitary pad, and if I walked very fast or exercised, my bladder would empty completely," says mom Candice Stone.