I have some cardiophobia, and tend to take my pulse every day, more often than I probably should. But recently I've been noticing that while at rest, I will feel my pulse and my heart rate will go from around 67 to 85 in less than 30 seconds while sitting down. I use the Instant Heart Rate app on my android to take my pulse, in addition to feeling it on my neck. I'd like to note that I'm a 23 year old male, have been to the cardiologist recently, and have been told I have nothing to worry about, and that's it's my anxiety that's causing me to worry so much about my heart. I also had a 2 week holter monitor done about 2 months ago, and the results came back with nothing abnormal, save for a few PVC's and PAC's which I have been told are harmless in a structurally normal heart.
I would also like to add that I currently take 30 mg Remeron, 1 mg Klonopin daily, and 3 mg Guanfacine (spread throughout the day). My pdoc has prescribed me to start taking small doses of Dexedrine to get back on ADD medication, as I have some pretty bad ADD and have been off my ADD meds for several months to treat my anxiety. I have the medication, and was about to take it, but was a bit apprehensive when noticing how my heart rate varies at rest like this. Is this variation something I should really fret over, or should I just simply stop taking my pulse and get on with taking this ADD medication? I do have some xanax and ativan should I need it for any flare ups with anxiety, but at this point I am just wondering if I should stop taking my pulse and worrying about it.
Any insights about this would be greatly appreciated.