M.D.
J.,
This does sound normal. I think being on vacation she did get use to you being around, plus I'm sure she had a lot of fun on vacation. I have a 25 month old, but he's NEVER liked being left anywhere without me. He stays home with his daddy while I work, so if it's not one of us watching him, then he throws a fit. My mom has watched him a few times, but he fusses for her, not all the time, but through out the time we are gone. My husband says Mondays are always bad on him too, because we are together all weekend, then Mommy is gone. He knows I'm coming back, but I think it's just a close attachment.
Just down deep enjoy the closeness she wants to have, I have a 13 year old and I would give anything for her to spend some time with me.
I would just keep telling her you will be back. They do understand, she might not like it, but she does understand. Give it some time, she'll be back to herself.
Good luck,