May I make a quote from a book called child behaviour by Gesell & Gesell " if the child does regress then treat him as a younger child pad him well and start all over ! more or less what John was saying I would also endorse what john was saying about punishing the child it does not serve any constructiveity in helping your child ! as it will only make him rebell and make matters worse ! TLC is the order of the day and although it is frustraiting to a parent when a child regresses! TLC (Tender Loving Care is the order of the Day!)and all will be revealed gradually he will become more confident ! best wishes