I think I can relate to what you're going through right now....
My daughter was also around 20-22 months old when I first tried to take some time away from her. The first time I put her in daycare (drop-in childcare), I was also called back after 15-20 minutes because they couldn't calm her down...
Then the next few visits, she also cried and screamed when I was leaving (totally breaking my heart of course and making me feel like the worth mother on this planet!!!)..However I still left her and was told that she had calmed down after a little while.
It actually took quite a while (over a few months) before she was OK and understood that I was coming back for her.
This was just over a year ago...You should see her now! She just started in a new daycare (3 days a week) and she is doing so great! She loves it!
Looking back, I now see that my own "anxiety" played a big part in her crying....Amazing how they pick up on everything we feel!
Then I also had to learn to let go and stop feeling guilty for taking some "me time". I would talk to my daughter on the way to daycare...telling her I was going to do a few things by myself, and would be back very soon for her...and that of couse , I loved her very much..
After a while, my daughter stopped crying. Then someone nicely pointed out to me that she had been very good at playing with my 'mommy guilt'. Indeed!
How many times have you tried to leave her in daycare? 10-15 minutes isn't a long time (i know you probably think I am kidding right!!) for a child to settle down. I thought a minimum of 20 minutes was the 'norm' but I could be wrong!
Do you, like I used to, feel some guilt, putting your daughter in daycare to have some free time?
Anyway I hope these few lines will help you and give you some hope! It definitely takes some practise for both the mom and the child!