DS will be 7 in December has wet the bed for the last 4 nights (full on wee, not just a little bit). It took him a while to be dry through the night anyway but he's had no accidents for at least a year now. His behaviour has also gone down hill a bit (more answering back & tantrums). We've tried talking to him but he says nothing is wrong. Is this a normal phase to go through or is there likely to be something else going on?