So my son is 3 in may.. I am 30 weeks pregnant so really want him potty trained before hand. I've tried before where he took to it really well, did wees and poos on potty. So I attempted to put him in underwear..now he will not go on potty or toilet. He screams and cries and refuses to use anything other then a nappy. I do find it embarassing, as my mum and mil keep having digs at me about him not being potty trained..and has a go at DS when his nappy is full.is he to old for nappies? He knows exactly what the toilet is for..if I go for a wee he'll say "mummy gone for a wee wee" so he knows. He tells me if he's weed in his nappy and if his nappy is full.just refuses to not have one on. Even for 2 minutes.screams. What do I do? I've made a reward chart which he is fascinated in..or was until I told him its for when he goes wee in potty.