Welcome to Just Answer. I am an Adult Neurologist and was contacted to answer your question.
I would ask you about the diagnosis of small vessel disease of the brain, based on an MRI of the brain (?)
do you have risk factors? high blood pressure, diabetes, high cholesterol or lipids, family history of stroke/heart attack (small vessel disease), smoking? Migraine headaches?
shortness of breath, fatigue, chest pain, have you had a Chest Xray? do you have any lymph node enlargement?
did this come on suddenly (sarcoidosis)?
as you are offline, please get back to me to discuss, ask questions Dr Frank t