If you have a normal heart
structure then these are not dangerous except in rare circumstances. Have you had an echo to check your heart structure? If not, you should, especially if you suffer from health anxiety as many do. Once you know your heart structure is fine, then you just need to learn to live with these, I know that's easier said than done. Just remember, if your heart is fine these will not kill you, they are more of an annoyance than anything else.