DD2 has been peeing through her diapers 3-4x a week. It's getting old! We use Luvs during the day and Pampers at night (she was peeing through the Luvs every night, Pampers are better.) Do you think it's worth buying special night time diapers or trying to go up a size? I think 4s will be huge on her which is my hesitation on doing what I've done in the past. She's so petite that 3s are already plenty big.