My 2.5 year old boy just started preschool a few days ago. He cries hysterically when he goes to school and has nightmares at night. I am close to pulling him out from school. What should I do?

Make sure you check with the school. My nephew was the same and my sister thought it was separation anxiety. After 6-8months she decided to change school. She applied for tours to a lot of schools and let the child decide what he like. After he decided. He was happy to attend and there was no more crying. It can be the teachers he doesnt like or the kids. Who knows but it help changing.