My 3 year old son refuses to use the toilet in any way. He doesn’t even want to sit on the toilet seat. I feel like it is my fault because I got angry at him once. I just had his little sister, he had an accident and I screamed at him. I don’t normally scream or get angry. Now every time he does a number 2 in this nappy, I try and tell him that it is wrong, then seat him on the toilet – but he just cries. What should I do? Please help.