1st week of intensive running- energy in upper torso suddenly seized (as in a panic attack although i was not frightened by anything) and assumed to be consumed by body when pushing my limit and then body drew from heart with one loud thud or dong sound, literally felt like energy bubble or whatever collapsed in on itself, then went to sleep 4-6 hours later for about 4-6 hours, after awakening felt like heart had been bruised and was healing. The wk end of the same week had about 3 or four stings in center of heart. None of these seemed to serious but, the following week or this week i had mild heart pains at bottom center of heart about 2 and 1 half hours later with shortness of breath. I figured it was only fatigue and it only lasted for a few seconds. Im convinced it acted in relation to me walkin while not having recovered from the morning workout.
Hellothank you for posting here your complaints seem to be non-worrisome. Because the symptoms are not typical. Since you have started intensive running, these symptoms maybe related to inadequate calorie supply to the body. I advice you to plan a diet rich in proteins and small amount of fat to supplement your body during exertion. Also don't start intensive just in a day. Go forward in gradual steps so that the body and its organs gets accustomed. In case you still find these issues a treadmill test (stress test) can be done to detect heart disease. Thank you wishing you good health