S.B.
Did you prep her for this? I have a 15 month old, and any time we stray from the regular routine, my husband and I start talking about what is going to happen about a week ahead of time. We have had tremendous results with this. When we travel, get her hair cut, anything out of the norm, we always prep her verbally about it.
They will just go through this sometimes too. My daughter has been going to FT daycare since 1 month old, and once in a while, she'll get whiney when I leave. No logic about it. I think some days they may need more cuddling than others; kind of like us adults.