Hello! Thank you for asking on HCM! I read your question carefully and understand your concern. It is necessary to perform a comprehensive differential diagnosis between different disorders related to your symptomatology. The main disorders to take into consideration as possible responsible for this clinical scenario would be an inner ear disorder and a transient ischemic attack (TIA) in the vertebro basilar system. I recommend consulting with your GP for a careful physical examination, a resting ECG and some blood lab tests (complete blood count, thyroid hormone levels, kidney and liver function tests, blood electrolytes, fasting glucose etc.). A doppler ultrasound of the cervical vessels would be necessary to examine the blood flow to the brain. If all the above tests result normal, I recommend consulting with the ENT specialist for a physical examination and labyrinthine tests to rule in/out any possible inner ear disorder. Meanwhile I recommend to carefully monitor your blood pressure and avoid straining physical activity. Hope to have been helpful! Best regards, Dr. Iliri