Hello and thank you for using HCM.I carefully read your question and I understand your concern. I will try to explain you something and give you my opinion. You should know that this loud, fast heart beats has to do with a rhythm issue. It might be just a sinus tachycardia meaning that your heart beats over 100 beat for minute and you feel it like a strong and fast beat. Itmight be what we call extra sistolic beats that are some electrical impulses that generates in parts of the heart different from normal sinus rhythm.They cause a premature heart contaction that its not a normal one and you feel a pause and than a palpitation or a strong beat. The causes of this rhythm issue might be different. Emotional stress is one of them.But there are also other reasons like excessive coffee consumption or pathologys like anemia, hyperthyroidism or electrolyte imbalance, heart pathologys, gastric problem like reflux ect. So, if you have still tbe same symtoms after using an anxiety medication than its time to do some examination. I would recommend an electrocardiogram, a cardiac echo , a full blood analyze to exclude previous problems and the most important one a holter rhythm monitoring to see your rhythm tendency. Only after this we can be shure what we are dealling whith and how to treat it. Hope I was helpfull. Best regards, Dr.Ervina.