Welcome to HW, I hope we can help you out here. Are you worried about not being able to go on the trip or are you worried about everything surrounding the trip?
I often get into a panic when I have to go on a trip, will I get sick? Will I panic? Will I be a pain in the backside?! I find what helps for me is to write down a list of everything that could go wrong (and I mean everything!) and then write a list about how likely it is to happen.
Often when we get things down on paper it gives us a better perspective of the reality of the situation. Try and focus on the fun you will have, not the fear of anything going wrong. You deserve a break.
I hope you and your husband have a wonderful trip away. Please let us know how you are going and ask any questions you need. We are here to support.