I'm sorry that it is so stressful on you to leave. My son went through a period of time like that, and eventually grew out of it. He is now becoming a real Daddy's boy!
Have you tried "The Happiest Baby on the Block"? We found that to be really helpful (it comes as a book and DVD) - it's great for calming upset babies. Maybe try to get her to sleep before you leave - thats about all I can think of right now - or put on a Baby Einstein video? They have been a huge help to us also!
You could ask your pediatrician as well, he or she might have some great ideas too.
Hang in there and let us know how you do!
