Apart from these,the other causes of lightheadedness are hypoglycemia,orthostatic hypotension,TIA,impending stroke,inner ear diseases,meniere’s disease, endocrine disorders like
thyroid, adrenal glands,
and pituitary gland disorders
and carotid sinus syndrome.Pls discuss these possibilities with a neurologist and get yourself thoroughly examined.
Hope it helps.Take care and pls do keep me posted on how you are doing.