Three weeks ago i was sitting talking and got sudden tightness in my upper middle chest area and pain. I believe my breathing got faster. After 15 minutes, the symptoms susbided and went away. Then, it just happened again today. identical symptoms and after 15 minutes, it slowly subsided and went away. I am 54, five foot ten, 204 ilbs, no history of heart disease and haven,t smoked in 20 years