About half don't seek help and plan their day restroom to restroom or deliberately dehydrate themselves. Most can be helped and, in many cases, cured. It's not due to normal aging and it's not confined to the elderly. In the nursing home, nearly half the population has this problem because incontinence promotes institutionalization. Get it fixed.
Many physicians have little experience of the correct evaluation and treatment of the problem.
If your doctor is one of these, find another with the skills needed to help you. About two-thirds can be helped by the family physician and a third need specialty care. Correct evaluation will lead to proper treatment and a satisfied patient. Some changes occur with aging. Younger people excrete most of their fluid before bedtime.