Hello! Welcome and thank you for asking on HCM! I understand your concern and would explain that your symptoms don t seem to be cardiac related. Does this feeling change with breathing or body movements? This would be indicative of a musculo skeletal cause. Anxiety could also mimic this clinical scenario. I recommend consulting with your GP for a careful physical exam, a chest X ray study, a resting ECG and some blood lab tests : -complete blood count (possible anemia or infection) -PCR, sedimentation rate (possible inflammation) -kidney and liver function tests -blood electrolytes. If all the above mentioned tests result normal, the main cause of your troubles would be just pure anxiety. In such case I would advise consulting with a specialist of the field, to help you manage your anxiety. Meanwhile it is important to avoid caffeine and energy drinks and perform a lot of physical activity (walking, aerobics, etc.) Hope to have been helpful! Best wishes! Dr. Iliri