I know this isnt related to cancer but this is scaring me so much that it’s affecting my everyday life. So recently I’ve been obsessed with my heat and if it’s normal or not. I’ve noticed that sometimes my heart can be very slow (around 50 bpm) and sometimes it’s very fast (130bpm) - when this happens I start to worry a lot and I try to calm myself down but I just make myself panic more. This lasts for around 5-6 hours. 

Whenever I count my heart rate I do it for 10 secs and remember that number, 15 secs, 30 secs and 60 secs and remember the rate during these times. I then multiply it to check if it’s regular or not. Sometimes it’s not. Eg when I calculated it at 10secs the number of beats was 12, then I calculated it at 15 secs which was 18 but when it reached 30 secs it was 39.  (Sorry if this is confusing) so when I multiplied 12 by 6 it was 72 but when I multiplied 39 by 2 is was 78. I don’t know if this means my heart beat is abnormal or not. 

Im scared that I might have a serious life threatening heart condition or heart failure. I’ve downloaded so many apps in my phone that found your heart rate . I’m scared that I will die from a heart attack. Stroke, or cardiac arrest. 

I dont know if this is caused by my anxiety or or if it’s sefious. I tend to get scared easily. Last time I went to a doctor they said that my heart was beating fast because I wasn’t eating properly. 

Can an someone help please ?