Hello! Welcome and thank you for asking on HCM! Regarding your concern, I would recommend performing some tests to exclude a possible infection. Besides a careful physical examination, I would also recommend performing these tests: -complete blood count, inflammation tests (for possible infection) -blood electrolytes (possible electrolyte imbalance) -urine analysis -thyroid hormone levels (chronic fatigue, heart rate changes may be related to a thyroid dysfunction) If all these tests result normal, there is nothing to worry about. Hope to have been of help! Feel free to ask any other questions whenever you need! Best wishes, Dr. Iliri