Hello! Welcome on HCM! I carefully read your question and understand your concern. Your symptoms could be related to different causes : including thyroid dysfunction, chronic anemia, low blood pressure, sleep apnea, etc.. Have you measured your blood pressure values? So, I would recommend consulting with your attending doctor for a physical check up and some tests: - a chest X ray study and respiratory function tests - an arterial blood gas analysis - a cardiac ultrasound - thyroid hormone levels - cortisol plasma levels for adrenal gland dysfunction - complete blood count for anemia - vitamin D and vitamin B!2 plasma levels for possible deficiency A multi-sleep latency test may be needed in case sleep apnea is suspected. Hope you will find this answer helpful! Kind regards, Dr. Aida