Your not silly. I have to leave my two in July for 10 days and I'm a wreck already. I dont think she will feel abandoned especially if she goes there for day care. She may regress with potty training a little. Just make sure they know she is still potty training and that she likes to put everything in her mouth. Have you toured the boarding facility yet? If not, I would do it and talk to whomever runs it. Good luck, I know this wont be easy for you.