E.
Hi-
I understand - the harest thing is when your chlid cries when you leave daycare. If it is any consolation, my daughter is also 3 - and has been in daycare since she was 9 weeks old. She still has a hard time separating from me when I drop her off - but she is fine once I am gone. As long as she is ok during the day, rest assured that the momentary trauma in the morning is harder on you than it is on her.
good luck!