My son is 3 1/2. He is potty trained throught the day for pee, and wears a pullup at night and nap. He refuses to go poop on the potty, and wants to go in a pull up. He has pooped on the potty twice before and now refused to do it. We have tried everything with him. rewards etc. My fear is that he is going to start school and not know how to go and kids will laugh at him becuse he wants to crap in a diaper. Please help                             

Michelle