I think it sounds like panic attacks/anxiety as well. I know it sounds strange but what sold me was the waking in the middle of the night part. I think you would be surprised how common your symptoms are -- people don't talk about this stuff at work or parties.
I agree that no specific treatment is necessary. The hard part will be getting passed the OCD component. I have made similar recommendations in the past about antidepressants. My guess is that it will get better with time but it is worth considering the medications. You should be reassured by the negative full cardiac work up.
Hi, for me it is over a year or more. Every wake up (morning or mid night), my heart will run like an express train. Last few months, it started to sweat. If I awake 8 times during my sleep, my blanket will collect the sweat. The final woke up just like I get up from the swimming pool! A year ago, I told my cardiologist. My chest like having an express train every morning when I woke up. He told me, the pacemaker senses I awake so it pace (top up) the heart rate. It prepares the rate for me which I can run for the day. Gosh! Don't need to pace like an "express train"? Must be my pacemaker (not me) is having an anxiety or adrenaline rush!