Why does my chest hurt when I inhale, yawn, etc?

For a couple of days now, I have had sharp pains surrounded by my chest when I inhale deeply, yawn, cough, laugh, or make speedy movements. I have had Energy Induced Asthma for about 5 years, but own recently outgrown it. My guess is pleurisy,but that's a pretty rough guess considering I'm 14 and have no medical research under my belt. Any facilitate would be much appreciated. Thanks
Answers:    Hi Mark;

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