You could go to an audiologist - it could have something to do with your sense of balance, especially if you have difficulty when moving your head
Excerpt from NCIB - Confounders of Vasovagal Syncope: Postural Tachycardia Syndrome...
"While most cases of syncope are due to vasovagal syncope (VVS), more common than syncope is presyncope. Cardiologists working in a syncope clinic or in a tilt table laboratory will realize that a common confounder of vasovagal syncope and presyncope is postural tachycardia syndrome (POTS; primarily presenting with presyncope)."
Presyncope is lightheadedness, muscular weakness and feeling faint as opposed to syncope (fainting). The hallmark of POTS is an increase in heart rate by at least 30 beats per minute within 10 minutes of being in an upright position.
Tests for POTS includes electrocardiography (ECG), active stand test, head-up tilt table test, 24 hour ambulatory blood pressure and heart rate monitor, echocardiogram (heart ultrasound), blood tests to rule out other conditions (kidney and liver function tests, ferritin, thyroid, calcium, glucose).