Anxiety is the worse thing for your tachycardia, it’s one of the triggers. Stimulants of any kind are triggers, caffeine, chocolate, alcohol etc. Research my answers on this forum, I already talked about your situation because I’ve experienced it all because of a birth defect in my heart. Also, have an Electrophysiologist cardiologist check you out not a Regular cardiologist. An Electo cardiologist is a specialist in heart rhythm issues such as Tachycardia, Bradycardia and A-Fib. None of my regular cardiologist ever recommended an Electo but instead prescribed Metoprolol which I had Major issues with. This is just my opinion and not a diagnosis of your health problems.