I have just had the Bank Holiday weekend from hell trying to potty train my little boy. He is now nearly 4 and this is the 3rd time we have tried getting him to start using a potty but he is just completely unwilling to cooperate. He won't sit on a potty or a toilet and throws massive tantrums. We are sticking to our guns this time - I don't want him to keep thinking he will get back into nappies if he makes enough fuss but we have made absolutely no progress and he holds everything in so he doesn't need to go. Last year he gave himself a bladder infection doing the same thing. I am feeling so frustrated. He starts school in September and I can't bear for him to be the only child still in nappies. All his friends are dry and have been for some time but he shows no inclination to want to be a 'big boy' like them. In every other respect he is a very bright little boy, though he is very shy. I really think I need some specialist help but don't know where to go