Is there any other symptoms that occur while you are having the fast beating heart?

Mine sometimes beats faster then normal, my normal heart rate is 60-65 some times it is 80 but I feel anxious when it happens - not sure if it is before or after my heart starts beating faster though. Yesterday when I went to the dentist it was about 100 and I was getting the missed beat too - now this is because I was very anxious as I was getting a tooth removed

If anything just worrying a whole lot and some anxiety, but my mind attends to be stuck on health problems all the time. And I do get some palpitations with them. My normal heart rate is normally 70 to 80 but when i'm not active it's sometimes 60 to 70.

Sounds typical anxiety to me.
When I first got anxiety it I would worry about every little thing - now I let nothing bother me, I have bad days but rather then sitting or laying down feeling my palse all day I make myself do stuff. Each time I got the missed beats I used to freak out now I know what they are so I just ignore them as much as possible. I used to get bad chest pain and stomach pain and just feel like rubbish. Now I can get passed it. I am on no medication but I do have xanax incase I have a day where I can't get it under control. Thankfully they are getting further and further apart

Thank you !!