This Am I Awoke With A Dull Pain In My

this am I awoke with a dull pain in my upper left chest area. it seemed to be referred to my lower left abdomen I took a regular aspirin. I exerxised for about 20 minutes, walking first and then riding a stationary bike. my heart rate was 100 when I began riding the bike, although it had felt higher while walking. ( I regularly try to raise my heart rate to over 112, so I know how that makes me feel. ) I then ate pancakes and bacon, and my teeth and jaw were extremely sore. I thought I might have TMJ although I never have had that before. About 12:00 I picked up a few items at the store, and driving away I had a pain across my chest and got a metalic taste in my mouth, After that passed I felt a small pain at the base of my sternam on the right side. I stopped by the emergency room and spoke with the man at the registration desk, and he pointed to a filled lobby and said it would be long wait. I drove the 2 blocks home, and am still having pain in my dleft chest area. I just took another aspirin.