GAS, ACIDITY, HEART RATE INC. AFTER MEAL

Am 26yr. weight 80kg. am suffering from gastric and acidity, which lead to chest pain left side. then i done my ECHO TEST, troponin TEST, CHEST X RAY,ECG,ULTRASOUND OF ABDOMIN. All my test were normal doctor said i have gas problem. But now, when i eat meal, my heart rate goes high upto 110 at resting and 120+ at walking,which came down to 80-90 after 2-4 hours. my normal resting heart rate is between 80-90. also after dinner in sleeping time my heart rate remains 95-96. Am so tense abt it. Also sometimes direct after eating food i have to go for bowl movement. sometmes 3 times a day. bowl movement occur anytime in day. Am taking vitamin D tab once a week and vitamin B12 tab daily at night.and i stil hv problem of acidity, burp after meal and after drinking water after meal.milsld chest pain in centre and left side of chest which comes for a second only.i dont feel anythng in chest only pulse rate remain high after meal. plz tell  am hving any HEART PROBLEM or its side efects of gas?