The only way I was able to tell that caffeine was actually making it worse is that I stopped for a week (except for
tea) and then I had a soda. I felt awful! My heart was racing more than usual, and I was really jittery, like shaky hands.
Another one of my triggers is sugar (I think). I bought some caffeine free orange soda, and after one glass I felt the same jitters and shakiness and increased HR as I did with the caffeine, then I looked at the bottle and it had 50 g of sugar.