I'm really worried because my heart rate is usually at 100 or above. I check it by counting the pulse on my neck, and it comes out to be something like 24 to 27 pulses in 15 seconds, which is more than 100 when I calculate it for a minute. I have a history of panic attacks that started back in 2015 with a very fast heartbeat, and I was told it might have been due to acid reflux. It happened again in 2019. I'm really scared of traveling, especially late at night during long journeys. I get these terrible thoughts about what if I have an attack and theres no one around to help, like if the train is passing through a jungle. These thoughts just make my heart race even more, and I end up feeling extremely scared. Can you please help me understand what's going on and how I can handle this?

It sounds like you may be experiencing symptoms of anxiety, especially given your history of panic attacks. The rapid heartbeat you are feeling could be related to anxiety and stress. To help manage your symptoms, I recommend trying relaxation techniques such as deep breathing exercises, meditation, or yoga. In terms of medication, you can consider taking a beta-blocker such as Propranolol. Start with a low dose of 10mg once daily, and you can increase it as needed under medical supervision. Beta-blockers can help reduce heart rate and physical symptoms of anxiety. However, it's important to consult with a healthcare professional for a proper evaluation and personalized treatment plan.