Get another medical opinion, a new doctor, or see a pediatric urologist. Your son DOES TOO have a problem! My son had it too - it's called nocturnal enuresis, which means peeing at night. There is a simple medication that can be taken, no side effects, etc. We did everything you are doing, and even invested in one of those alarms that go off when wetness is detected. Nothing worked. My son went on the meds around age 6 I think, he went off at 9, the problem came back, and he went back on. The pediatrician and the pedi urologist said there was no reason he couldn't stay on them until he was 20. He never had a side effect, except good ones - we all got sleep and did a lot less laundry, AND he could spend the night with friends if he wanted to. We sent one pill in an unlabeled bottle, and told him to tell the other kids it was for allergies. We told the other parent to be sure he took the pill before bed. Easy easy. He even went to sleep-away camp for 5 years. No problems. He took himself off the pills around age 12 or so, with no recurrence. It all has to do with the rate at which the child develops the "bladder-brain" connection - when a full bladder sends the signal to the brain to wake up. There is nothing you can do behaviorally to train his body to do this. It takes time. He's doing well in other areas, he's happy, he has a big yard - why not give him some sleep and some peace of mind! I can't remember the name of the medication now - my son is now 19 - but I can find out if you can't get your son's doctor to take you seriously.