My son is 3yr 2 months old and weighs 22 kgs. I am using pampers dry pants xxxl size. but it is becoming tight for him. can anyone suggest any other diaper and size bigger than that? Also as he is drinking milk at night i change his diaper once at night. so i am hesitating to make him go to bathroom as he has to wake up more no. of times and that disturbs his sleep cycle.