Had strong acid reflux and gas problems in October 23. Felt something stuck in throat, even after drinking small amount of water stomach used to get full. After a week mild chest pain left arm n shoulder pain started with fast heartbeats and high BP.  2 ECGs came normal blood tests normal, lipid profile a bit elevated. After taking acidity medications prescribed by cardiologist and family physician heart rate and BP came back to normal but tachycardia keeps coming and going when I get acidity or gas problems or after eating too much or after standing.. No chest pain or fatigue after exercising or walking or cycling(10-12km) , I don't understand what is happening, please suggest, thanks.