I didn't read all the answers so forgive me if this is redundant. DON'T sneak away. Your daughter needs to be able to see you leave and know that you are coming back later. Your sweetie is the prime age for separation anxiety, so her response to you leaving is completely normal and may continue this was for a period of time.
I would have suggested that you drop her off for a shorter period of time a few times a week, but by now at two weeks, it's probably too late for that. Now you just need to take her in, give her a kiss and a hug and let her know that you'll be back at the end of the day. Don't say you'll be back "soon," Babies don't know what that means... are you going to the bathroom? Are you getting the mail? What is soon?? Reserve that for times when you really will be gone a short amount of time. If you pick her up right after nap, say I'll see you after nap. So if you can be specific then do that.
Stay positive with her, give her smiles and kisses and leave quickly. Don't stand at the door with a sad expression because she will pick up on that and be sad too. If you're worried call the provider in about a half hour and check.
In my experience most children are fine a few minuted after mom or day leave. Kids are easily redirected for the most part and a good provider will be able to soothe your child in a reasonable amount of time.
In rare situations it has been best for kids to leave them at the door. I know this sounds harsh, but it's a clean break that's needed for some kids. (My daughter was on of those kids, and I found this out at kindergarten, when teachers don't tolerate you hanging around until the child decides you can leave.)
She will stop crying when you leave, I promise. Then she will cry when you pick her up because she doesn't want to stop playing!! Take care!