Keep On Gainin'!

Cash had his final set of shots today until he's a year old. He took his shots like a trooper and only shed a few tears for a couple seconds then was back to his happy ol' self. He's up to 18 lbs 10.5 oz and growing like a weed. :)
We are having a couple issues recently. Cash has been very restless at night for the past couple weeks - not sleeping good, tossing and turning, waking up crying.... The past two nights he hasn't wanted to sleep unless he's being held. Needless to say, Mommy & Daddy are very, very tired!
Cash has also been peeing out his diapers at night. I've had some suggestions, such as bumping up a diaper size, using overnight diapers, doubling up on diapers.... I have bumped up to the next size and thought that was going to work - it did the first night but now we're still having a wet Cash & wet crib about 4 nights a week. The overnight diapers are a couple sizes too big for him so not trying those yet, and haven't tried doubling up on diapers at night, either. The diapers I'm using are supposed to "keep baby dry for up to 12 hours" but at night (and only at night) Cash is peeing out of them after about 4 hours. Ridiculous, I say. Hopefully we'll be able to get into the overnight diapers soon and the problem will be taken care of!