I find it hard to go on trips alone and return home. For me however, it is my mind that gets busy. When I am home I do not have to think so much because I am going all the time. While gone, my mind goes into overtime. So my feelings have changed while I have been gone.
I can sympathize with your feelings on returning. Tell your H that you are triggering while being gone. Talk about what made you trigger. It is awkward, but it is your reality.
It is very difficult. Hugs to you.