Hello! Welcome and thank you for asking on HCM! I read carefully your question and would explain that your symptoms seem to be just pure anxiety. It is normal to feel your heart beat through your stomach, when you are resting (the heart beat vibrations are transmitted through the diaphragm and you can experience the feeling of a heart beat in the stomach). This is certainly more obvious in sensitive persons. Regarding the numbness and chest discomfort, I would recommend consulting with your GP for a careful physical examination, a resting ECG, a cardiac ultrasound (to examine better your cardiac function) and a chest x ray. The face numbness (including the neck and left arm) may be also a sign of a neurological disorder. A neurological consult, coupled with a cervical spine x ray study are needed to exclude any nerve compression. Some blood lab tests like (complete blood count, thyroid hormone levels, fasting glucose, blood electrolytes, kidney and liver function tests, etc.) should be done for the exclusion of possible metabolic causes, contributing in this symptomatology. Hope to have been helpful! Best regards, Dr. Iliri