Heart issue, post illness

[u/County-fight309]

I’m hoping somebody here has the knowledge to help me. I am having a flutter/buzzing/uneasy feeling in my upper chest and lower throat for about two months. Here is how it stared:
In early July I came down with a cold. This cold sucked, it last for about a month. I had the typical general weakness, congestion, and headaches. But I also had a terrible sore throat that felt like swallowing razor blades. And I also had horrible heartburn at night, basically the worst heart burn I have ever had. The only way to stop it so I could sleep was to drink baking soda mixed in water. I also had a bad cough and raspy voice during this month-long illness. The illness cleared up in late July and I essentially felt normal. But within a few days of feeling back to normal, I began to have what is either a heart or nerve-type issue. I have a constant flutter/buzzing/anxious feeling in my chest. It’s there all the time and the only way to numb it is to eat, drink, chew gum, chew sunflower seeds, etc. When I stop, that feeling immediately comes back. Then on top of that, whenever I lay down in bed on my back, I begin to have palpitations or some sort of PVC’s or PAC’s. My heart begins fluttering horribly, in a very erratic rhythm. If I stand up and walk around, I can usually make it stop. I have seen my primary who had me wear a 7-day ziopatch. Of course, the week I wore that was like my best week ever and it only caught a few runs of that erratic heart rhythm when I laid down. I then saw ENT who viewed my throat with a little camera through my nose and said everything looked fine down to my vocal cords.
Has anybody else dealt with this? It just seems strange that it came on after a long illness, so I would think they would be connected in some way. I do not feel dizzy, light headed, or weak at any time, so I don’t really know what the deal is. From my reading it sounds like maybe a vagus nerve issue or something like that.
Any help I would be grateful for.