my dd always asks me, in that too adult tone of voice, "So, mom, what did you do while I was at school today?" LOL!
She gets upset unless I tell her I stayed home and cleaned......
At almost 5, she is always excited to go to school. I would talk to your child's teacher about it.
BTW, our situation is very similar. I am a new SAHM, she has always gone to daycare before this. She is proud of the fact that she gets to come home for lunch and doesn't have to stay for naps.