K.B.
Maybe try moving her bedtime back to the early one? I have found that travel and the intensive periods of activity that it brings can propel a child in development (we would always come back from family vacations with an increased vocabulary and new ways of playing). She might have even more going on in her little brain these days and therefore be more tired. She may be freaking out because she's way way overtired and can't easily settle herself down. But if you get her down earlier, when she's still in a decent mood and hasn't drifted into cranky yet, she'll have an easier time. No matter what you try, be prepared for a slow adjustment... changes can take a few days to make a difference. Good luck!