I have separation anxiety

My husband and I have been thinking about going on a cruise this summer because we seriously need a vacation. We never had a honeymoon either so it would be a little getaway for the both of us to enjoy each other. Only problem is I can’t stand the thought of being away from my daughter for a week. It breaks my heart! She will stay with my mom and she’s completely comfortable and well taken care of there, but it still doesn’t feel okay and I feel like I’ll be thinking about what she’s doing ever minute of the day instead of relaxing 😭 plus, I’m used to being with her 24/7 because I’m a stay at home mom. What can I do to get over this??