I hope sabajane comes back to see your answer! What exercise are you doing? I'm glad this stopped. You should, at your next physical, mention that it happened even if it has stopped. Tell me about the exercise you are doing though!
It may not be heart attack. I don't want to scare you. But its it's best you go to rule out that. If it happens more often after you eat . Then could be gall stones. I had them and went to emergency because the pain as was so bad. It felt like I was in labor. So the pain of that can be very bad. Still go to doc either way. They will at least help with pain. And possibly save your life.
Hi. You should go to hospital right away. Those are some signs of heart attack. Tell doctor at emergency hospital..do it now dear. It's extremely important.