T.F.
It's normal... A very happy time for a well adjusted pre-schooler!
When my one and only went to preschool and K I was so hurt. She was so excited. Others were hanging on to their mons legs not wanting to go.
Mt daughter just said "bye mom... ". Ouch.
As much as it hurt, letting go, I knew I had a well prepared child so eager to go to school.
Move forward.... She is 16, drives herself to school, stays for cheer and thrives on being independent and responsible.
It's tough but you will be ok!!