Michael starts preschool

I am freaking out. Tomorrow is Michael's first day of preschool and I am a ball of nerves. I am trying to be positive but I can not relax. I know how Michael is with new stuff and I have no idea how bad it is going to be but it is going to be bad/hard and I just am on edge about it. I have talked to him about it all weekend and even today. We have read books about starting preschool and he response to me is "Go Home". So I have no idea if he understands what I am saying or not. I tried to warn them of all his behaviors and that he bites and throws everything but I am not so sure they really understand as they have never seen his true colors as of yet. I just don't want any of the other kids getting hurt because of him.  Kaylee's fist day of preschool was so simple and I did not even give it a second thought. We dropped her off at the door she walked right in and never looked back! I am sure that wont happen with Michael tomorrow. I think it will be a problem to even get him in the door and I am sure he will scream for the whole 3 hours at school. But they are trained to handle this and they all know ABA so lets hope by summer time he will be wanting to go to school all the time.