I dont know what to do anymore! Help me!?

u need to chill out. ur child has had an awfull start to life +i'm guessing u feel terribe about everything thats happened 2 him. I'm guessing he feels safe with his sister cos she has normal stuff on her mind +she isn't constantly reminding him about what happened with her worrying. the more u worry the more he will freak out. the less u think about the bad stuff the safer he will feel. i know its hard we parents always feel guilty about everything but seriously try to relax +have fun with your kids as if nothing bad has ever happened + soon it will be just like nothing has ever happened. love peace + happiness.