Just to preface all of this, I also struggle with OCD, which leads to be having an acute hyperawareness of all of my bodily functions.

I have only had this happen for one period of time before, October-November 2020, where I became so intensely stressed about a number of things that I began feeling my heartbeat day in and day out for about two weeks straight with no breaks, even when I felt normal. And when I say I feel it, I feel every single beat, and it feels as if it's pounding constantly. Similar to having gone for an intense run and feeling that beat in your chest. I ended up in an ER after that first week of dealing with it and they told me all my vitals were perfectly normal. It ended up going away with no explanation a few weeks after it started.

I am currently experiencing this again after having gone through a week of excitement, stress, and a lack of decent sleep. It came back with absolutely no warning and even as I type this out I feel it. 

Anybody else have this very odd symptom?