Hello! Thank you for asking on HCM! Regarding your concern, your symptoms seem to be related to gastro esophageal reflux or gastritis. These disorders could also explain the feeling in your arm (irradiated pain). I recommend consulting with yuor GP for a careful physical examination, a resting ECG, a chest x ray and a routine blood check up (fasting glucose, complete blood count, kidney and liver function test, blood electrolytes). It is necessary to perform a gastro intestinal endoscopy to rule in/out the above mentioned disorders (gastro esophageal reflux, hiatal hernia or gastritis). You should discuss with your attending physician on the above issues. Hope to have been helpful! Greetings! Dr. Iliri