In past weeks I've had a few unnerving cardiac moments with irregular heartbeat, arrhythmia, or palpitations, along with extreme fatigue described well by you when you wrote "I'd go to bed exhausted and wake up even more tired". I'm not vaxed, but did realize after a couple of weeks and the symptoms began to subside that a huge new cell tower had been erected a block away from my house immediately before the symptoms began. I'm sure one has nothing to do with the other, though.