My two year old has just started preschool and he wakes up crying in the night. I am worried something is wrong at school. What should I do?

Starting school is a huge change in your baby's life. It will take him some time to adjust. Once he has adjusted to the routine, he will stop crying. http://www.popsugar.com/moms/5-Ways-Help-Preschoolers-Adjust-Changes-Routine-27333317