Hello! Thank you for asking on HCM! I read your question carefully and understand your concern. Your symptoms don t seem to be cardiac related. So don t worry about that! Have you measured your blood pressure and heart rate during these episodes? Is this pain modulated by respiration or body movements? This would be more indicative for a musculo skeletic pain. Chostochondritis could also mimic this symptomatology A gastro esophageal disorder (like esophageal spasms, gastro esophageal reflux, gastritis etc.) could mimic these symptoms. I recommend consulting with your GP for a careful physical examination, a resting ECG, a chest x ray and some blood lab tests: - complete blood count - PCR, sedimentation rate (inflammation) - kidney and liver function tests - fasting glucose - thyroid hormone levels (a thyroid dysfunction could explain the shakes) - cortisol plasma levels (adrenal gland function) - blood electrolytes, etc. A GI endoscopy would be necessary to exclude a possible gastro esophageal disorder. If all the above mentioned tests, result normal, the main cause of your symptoms would be just anxiety and psychological stress. In such case, you should consult with a specialist of this field to help you manage your anxiety. Hope to have been helpful! Best regards, Dr. Iliri