Awww, that's upsetting
Is she staying with Dad while you are gone? At this point you just have to keep reassuring her that you will be home soon and everything will be fine. Did you promise to bring her a special souvenier home? or that you will do something special - just the two of you - when the trip is over?
I can see her being uneasy and also a little jealous, a trip to the caribbean is a lot of fun and she doesn't get to go.

Is she staying with Dad while you are gone? At this point you just have to keep reassuring her that you will be home soon and everything will be fine. Did you promise to bring her a special souvenier home? or that you will do something special - just the two of you - when the trip is over?
I can see her being uneasy and also a little jealous, a trip to the caribbean is a lot of fun and she doesn't get to go.