Hello, I can sure relate to worry about heart issues. I am wondering, are you under more stress than usual? All the symptoms you listed point directly to stress and anxiety. I know the heart issues are causing anxiety and that can cause a vicious circle, the more we worry, the more pronounced the symptoms become.
I have skipped beats often, they scare me so much, I know the more I get the scared, the worse they become. Our hearts are very sensitive to our feelings. Anxiety is lots of the time the main catalyst as it releases the flight or fight hormone which is Adrenalin. Unfortunately, it a very upsetting vicious circle.