For the past six months he is really struggling to swallow food. He chews it until it is a paste and mush and will not swallow unless he drinks with it and then nearly vomits. He says he does not swallow as he is scared of vomiting. He is nearly five. What's wrong with him? Has anyone else experienced this? It happens with everything he eats. Boiled egg, soft chicken breast. Everything. At wits end.