Hi welcome to HCM... Yes according to history it seems to be acid reflux ...... By acid reflux reffered chest pain can occur... Continue using omeprazole on empty stomach ...before meal.... Head elevation while sleeping.... Don t get sleep immediately after taking meal.... Fruits more .... Excess spicy avoided... Coffe, pastries , chocolate less.... Avoid precipitating postures like bending , stooping forward etc. Heavy fatty meal restricted... If still no benefit investigate for hiatus hernia by x ray and manonetry or endoscopy.. If needed surgical correction needed... If respi symptoms appear like fever, dyspnea , cough then chest x ray needed for rule out respi causes. Consult physician with keeping this in mind. Take care