Hi welcome to health care magic.... According to your history here it could be gastritis or acid reflux like condition ....that can lead reffered chest pain... I am telling this one as first possibility because no other symptoms you have mentioned in history except drug history and pain on bending ... Take omeprazole for two week . Avoid excess spicy food... Head elevation while sleeping... Excess fatty food restricted... If you have other associated respi symptom like cough and fever then chest x ray need for rule out bronchitis.. With keeping this in mind consult physician. Take care.