My son is 2. He's been in daycare about 9 months or so. In his previous class, he never had an issue at drop off. He got switched to the 2 yr old class and throws a fit every day at drop off. He's been doing this about 2 months. The teachers say he's fine as soon as I'm gone. I don't know why he's doing this or what I can do to make the morning a little easier on him. Any advice?