Why am I crying before the day of my trip? Is that normal anxiety or childish?

So tomorrow evening, I’m leaving with my three relatives to go on a five day cruise. I am super excited. I don’t understand why I am feeling anxious and crying. I know I am PMSing and whatever (woman thing), but why am I feeling this way. It’s not like I’m unhappy. This is my first cruise. Is this normal or not?

Updates
9 mo
Plus it’s my first time traveling since my mother passed away and I know she would want me to have fun.
Why am I crying before the day of my trip? Is that normal anxiety or childish?
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