Marci! It will be ok, I promise! I know it's hard to leave them, but she will be fine! She will be sad, and a little out of sorts for probably 12 hours. (Becayse she'll miss you-and she should miss you, that's ok!) The next day, she'll be fine, and adjust to her new environment.
When we leave the furgirls at daycare, I don't worry at all. I do call, and make sure they're behaving themselves, and to make sure there aren't any questions, but I know that they are being well taken care of. Before I leave, I update and email this explicit list of instructions/information to our babysitter. It has everything on it, from who eats what and when, to what to do when Milli was teething, and vet numbers/names to potty habits, to our contact info. I know that other doggie moms and dads make fun of how thorough I am with this, but why take a chance? My 15 minutes of updating might help answer questions the babysitter might have, and it might help my dogs feel more at home while I'm away. I can send you ours if you want to use it as a template-just PM me if you want to see ours. I'm happy to share, as long as you don't call me crazy for everything that's on it!
I also send their crates with blankets (sleep with the blanket the night before you go, and then put it in there), a couple favorite toys that can stand up to being "shared" with "friends"
their treats, harnesses, leashes, etc. All of their own stuff makes them feel more at home.
I think the hardest part is not how Layla will do away from home, but how you will do away from Layla
Try not to worry, or she'll feel that you're anxious, and become anxious too. My mom used to have a cat that would throw up every time he saw a suitcase. Why? Not because he was sick, but because he would pretend to be sick so she would stay home with him! Kind of funny-but it's interesting to think about who had who trained!
Hope all that helps. Good luck!