My 4.5 month ds is showing signs that he wants to sleep through the night at last but recently has kept waking up due to wetting the bed. I moved him up a nappy size and do the nappies up tightly (same happens to dh when he changes the nappy so I know it isn't just me). This problem keeps recurring but in the past was resolved when I moved him up a nappy size but this hasn't seemed to work this time. It is so frustrating and I am beginning to wonder if there is something wrong. Is he peeing excessively? Once he has woken and I have changed him I can only get him back to sleep with a feed.