My husband and I think it might be time to potty train our 19 month old. He tells us when he has "poo poo" and he squats when he goes. There are just two things that are holding us back. He can't pull his pants down on his own and he's afraid of the potty. We're not sure if a smaller potty would work better. But the other thing is that we're expecting #2 in April and we don't want to start in the midst of that. Would it hurt him to wait until a month or so after the new baby is born?