Getting back on the wagon

. My husband and I went on t cruise to Alaska, a long standing dream of ours, and a nice way to celebrate 59 years of marriage. However, I came back five pounds heavier (of 15 lbs lost) and now have to pick myself off the floor and get moving on doing something. Have any of you had a similar experience of going off the wagon completely and and then having to pick up the pieces? HELP!