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
11 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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