It might help to keep your hands busy with something you can fidgit with to work off some of that anxious energy. My aunt uses one of those wooden fidget puzzle keychains. I'm not sure what they're officially called. They're small, easy to travel with and something you can hold in one hand and use your fingers to play with. She let me try it out once. I have no clue what the puzzle is, but I've found that just twisting and slide the cubes around without even having to look at it can be calming. Might be worth looking into.