Seperation Anxiety... will it end?! I need help..

Hi friends!!   I realized it has been awhile since my last post.  I just wanted to update you all on how things are going.  The cleaning service I started for myself has been excellent! I have gained quite a few clients and everyone is very happy with my work which makes me very happy :) I am however dealing with some separation anxiety with my girls.  Over this past weekend they cried at least 20 different times saying "I DON'T WANT TO GO TO SCHOOOOOL!!"  *Sigh* I hate this part of parenting.. making your kids do something that gives them such anxiety really sucks!!! Is anyone else dealing with this with their kids??  This is not just a "I don't wanna go to school" and then they get over it type of thing.. I am literately dealing with meltdowns every single morning before dropping them off to Kindergarten and Preschool. What are some ways you parents deal with this?? I've explained to them both that this is their "job" just like mommy and daddy have jobs .. school is their jobs and they need to go and make friends and have fun and learn just like every kid does.. but that isn't helping them cope.  I need some good mommy advice on how to help my girls do better when I drop them off.   Both of their teachers say they do great through-out the day and they interact with other kids and they don't cry.. its mainly at drop off and before drop off that they are falling apart and screaming "don't make me gooo!!"  So any advice from my fellow moms and dads who have experienced this would be appreciated!! What did you do to help your child get over "leaving mommy" in the mornings??  Thanks in advance for any advice :) I hope everyone is doing well!!