Tremors, especially in the hands and arms, or anywhere else I guess can be out of total fear, anxiety etc. as well. It could or could not have to do with the BFS. If you have anxiety issues I promise you it can be just that. I rememer one time being so nervous before a fight the my whole body was trembling. Obviously once the fight started and I got out of my head everything went away. I also tremble, tremor whatever if I get a chill. Most of the time my hands are steady, but certain things will spark it. A little bit of anxiety and it's all over for me. Heavy exercise, nervousness you name it. If it comes and goes I wouln't worry. If it gets constant or gets worse go to the doctor and have them look at it for your peace of mind. Because I can see a typical cycle here. Started to have anxiety, probably health anxiety about your bfs while waiting in line at coffee shop. You grab your coffee and in the back of your mind your saying god I hope I don't drop this because that would be a bad sign. YOu get nervous grabbing the coffee and your hand trembles a little. Then you say OMG whats happening. A slight bit of panic sets in and your start to tremble even more. Then on the way home, back to the office, whatever you constantly look at your hand. And the more you look at your hand the more it happens. You get caught in a cycle that's hard to get out of. Just a guess, but I am guilty of it all the time. So I am assuming it may apply to you as well.