Welcome and thanks for your question,even having these medical conditions you already have .
Any chest pain that does not go away,specially when it is accompanied by additional symptoms including a pressure or tightness sensation behind your chest,shortness of breath or dizziness must be evaluated in the emergency room.These symptoms could be caused by the presence of a clot blocking or obstructing your heart blood flow which could produce a heart attack.Specially,in your case,the pain improved when you took the aspirin( aspirin improves the heart blood flow alleviating the pain)).
The problem with heart angina or heart attack is that it produces similar symptoms to more benign conditions like:costochondritis(in this condition,the cartilage that connects the lower ribs to the breastbone becomes swollen or inflamed),gastroesophageal reflux( in this condition,the stomach acid juices flow back into the esophagus ),gastritis,stomach ulcers ,lung infections,strained muscles or peripheral nerve irritation.
The only way to know if this is a heart attack or any of the other conditions is performing an EKG and measuring your heart enzyme blood levels. So right now, the best thing you can do will be going to the emergency so you can know what is happening. In case,there is a clot or heart blood flow blockage,they will treat you immediately .
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