I have the same problem. I keep a change of clothes in my car. In my purse I have learned to keep a small decorative bag with a clean pair of undies and a spare pad.

At night I have used bladder leakage products. The extra long, overnight, extra thick type. I am almost 40. So I never know what I am gonna get, spotting or what looks like a mas murder has been committed. I still leak at night sometimes. I am seriously considering disposable underwear. The full brief kind. I really didn't plan on wearing "Adult Diapers" until later in life. Oh well, you do what ya gotta do.