Could This Be Angina Pectoris?

I haven't done anything active since I broke my arm in October of 2008. I mean i've ran a little bit, and played some soccer, but nothing major. I have always been athletic though. I weight 165 lbs. I'm only 19 years old. A couple days ago, I went to go play some soccer. It was about 85 degrees outside,... show more I haven't done anything active since I broke my arm in October of 2008. I mean i've ran a little bit, and played some soccer, but nothing major. I have always been athletic though. I weight 165 lbs. I'm only 19 years old. A couple days ago, I went to go play some soccer. It was about 85 degrees outside, wasn't very humid. I played for about 15-20 minutes and had chest pains, trouble breathing, and my heart was racing. I would also experience dizziness every few minutes. I looked up this problem and my symptoms looked like Angina Pectoris. I'm really worried, I'd say my heart rate was about 140-150 bpm. I had never felt like this before and could usually workout and run without running short of breath. Could i just be really out of shape, or is this something serious?
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