My 2 year old just started preschool. He had a nanny come to our home and watch him all day since he was 8 weeks old. We originally had put him in an all-day preschool since my husband and I both work. It has been a week and one day so far. He has had the typical crying when I leave him there and I was prepared for that. What I was not prepared for was the crying when I picked him up. He also doesn't eat breakfast anymore and breakfast used to be his best meal. He barely even eats dinner also. He is also a very small 2 year old. He is only in the 3rd percentile for height and weight. They say he is happy and that he eats at school but I don't see any of that. It’s not that I don’t believe them, but I only see the sadness. He is incredibly clingy when we are at home. He will absolutely not let me put him down. I can't even cook dinner because he won't let me put him down. Then when it is bed time, he screams uncontrollably for about an hour, continuously climbs out of his bed and bangs his head against his bed until he eventually lays down and whimpers himself to sleep. Either my husband or myself have to sit in his room to continue to put him back in his bed every time he climbs out. Then, he wakes up periodically throughout the night screaming crying. We then have to go back down to his room to rock him to sleep and put him back in his bed. It is like having a newborn again. He used to be so good at putting himself to sleep. We would read him a book and put him in bed and he was great. He would just roll over and go to sleep. No problem at all. Should we be concerned? And do you have any advice on what to do in our situation?