Very familiar (more)
My son, 14 years old, had a sudden AVM 10 years ago. Neurosurgery was done immediately but the damage was too great inside the brain and he was declared brain dead. Before this had happened, I had brought him to numerous doctors, neurology asking for an exam because he was complaining of headaches. I now know that had they listened to me he could have possibly been saved with surgery. I wish you the best of luck - but please get this checked out immediately.