Hello! Welcome and thank you for asking on HCM! Regarding your concern, your symptoms are very suggestive of orthostatic hypotension. A chronic anemia can exacerbate this condition. I recommend you to closely monitor your blood pressure in sitting and standing up position. A decrease more than 20mm Hg in your systolic blood pressure in standing up position, compared to sitting position would be indicative of an orthostatic hypotension. A head up tilt test would be necessary to confirm the diagnosis. Some blood lab tests (complete blood count, kidney and liver function tests, blood electrolytes, fasting glucose, etc.) are needed to exclude other metabolic causes. Meanwhile I recommend taking plenty of fluids to avoid dehydration and perform physical activity. Hope to have been helpful! Greetings! Dr. Iliri