1. After FIRST dose, I had reaction within 30-40 seconds where I found it difficult to catch my breath, felt like I might pass out, my palms were sweating profusely, & I experienced tingling in my extremities.  These symptoms resolved themselves within a few minutes, with the tingling resolving in about an hour or so.(no more noticeable reactions after that) 2. After SECOND dose, ...no immediate reaction like the first time, but arm hurt, as expected for the next couple of days.  I didn't notice any side effects until, 06/03, which was about 8-9 days later.    So I was running at about mile 4(I am a trail runner), when something just didn't feel right around my heart...some tightness, even some pain across shoulder blades.  I continued the run...turned into a run/walk.  I continued my day, with something feeling a little off and experienced some night sweats, & poor sleep.  I went a couple more days and then on Sunday I went to the local Immediate Care.  They did an EKG & sent me to ER.  At the ER, they did an EKG, and wanted me to stay to be monitored over nite.  At that time, I did NOT feel bad enough to stay, so I left with the agreement that I would return on Monday to do a Stress Echo on my heart.  HOWEVER, upon getting home and having a bowl of soup, I experienced what I would call my first episode.  Upon getting off the couch, my heart started beating unusually fast, it became VERY difficult to breathe, and I thought I was having a heart attack.  Long story short, I drove back to the ER, they checked me in, did another EKG, a chest X-Ray, a chest CT-Scan, admitted me overnite, where they drew blood every 4 hours, and attached me to a heart monitor for roughly 12-16 hours.  The next day they also performed a heart stress-echo.  Everything came back normal.    Since that time, I have had roughly 4-5 of those major episodes, with some smaller ones as well.  I went back to Hospital ER on 06/19/2021 with another episode that I felt was worse than the original one.  Again, they did an EKG, a chest X-Ray, various blood tests, and everything came back normal.    Amongst all of this, I have seen my Family Doctor twice, and a cardiologist once. Hospital performed a heart Calcium test, which came back with a score of six. I believe the range where medium risk of a heart attack comes in is around 100-200.  I have also been put on a Holter heart monitor, of which I have a week left of a two week assignment.  I haven't had a major episode in about a week and a half now, but I also stopped eating chocolate and given up all caffeine about a week and a half ago.  All of that said, I still have tightness in my chest, as well as just an odd feeling there. Other symptoms I am having include being light-headed, dizziness at times, and, more concerning, tingling and numbness in my extremities.  The tingling & numbness are primarily in my fingers, hands, and forearms.  In addition, twice my index finger on my right hand has turned blue/purple, but ultimately returned to normal color after 24 hours or so.  Finally, It is very difficult to get sleep.  It seems my heart tries to wake me up every 2-3 hours to let me know something is not right.  I can feel an unusual feeling almost immediately after lying down.  I really can't even explain the feeling in my chest, but I have never had this feeling before, and have never had sleep issues.  In summary, I WAS a 52 year old man with no history of any heart problems, a fairly avid runner with a resting heart rate between 40 and 50, and no history of dizziness, tingling, or numbness in my extremities.  After the 2nd dos of Moderna, I now have stopped running, have a myriad of symptoms as mentioned above, and my life has been flipped on its head for a month now,....moreover, I am getting little relief.  I need help.