DS is 3 1/2. He potty trained at 2 1/2 but still wore a pull-up at night. The pull-up would be wet once or twice a week. About three weeks ago he started waking up to pee. Last week I ditched the pull-up but then he had an accident and I put it back. The last two nights he peed in his pull-up again. Last night I actually noticed him tossing and turning when I got up myself to use the bathroom, and tried to get him to go to the bathroom, but I could see him starting to get mad/ making that pre-cry face. I was afraid he would get hysterical and thought maybe when the urge got stronger, he would get up. He used the pull-up again. Feel like we're going backwards. Should I take that pull-up away? Is he using it bc he knows it's there? Or is it not like that? Thanks!