Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with your doctor.
It sounds like you are having headaches, and that you had an MRI/MRA 2 years ago that was negative. I can not comment on the cause of your headache, but I will try to provide you with information.
It is understandable to be concerned about aneurysms or other causes of a headache, but it is also important to understand that after a headache has been adequately worked up with imaging, physical examination, and by history taking, a diagnosis of
primaryPrimary amyloidosis
Primary biliary cirrhosis
Primary hyperparathyroidism
Primary insomnia
Primary lymphoma of the brain headache
disorderAdjustment disorder
Anorexia nervosa
Asperger syndrome
Autism
Autoimmune disorders
Bipolar disorder
Bipolar disorder
Bleeding disorders
Borderline personality disorder
Bulimia
Chronic motor tic disorder can be made. There are several causes of headaches. Headaches can be divided into primary and secondary. Primary headache disorders are headaches without a direct cause. Secondary headache disorders are due to an underlying problem, such as a tumor, aneurysm, medication side effects, central nervous system infections, clots in the veins in the brain etc.
There are several primary headache disorders, over 50 different types. For example migraines, which usually a pulsating throbbing one-sided pain with nausea and discomfort in bright lights that lasts several hours. Another type is cluster headaches, which are sharp pains that occur around and behind the eye often at night and are associated with tearing of the eye and running of the nose. In primary stabbing headache, sharp or jabbing pain in the head occur, either as a single stab or a series of brief repeated volleys of pain. Primary stabbing headache often occurs in people with migraine.The pain itself generally lasts a fraction of a second but can last for up to one minute in some people.
If you continue to have headaches with a negative work-up (negative MRI/MRA), it is like you have a primary headache disorder. You may benefit from evaluation at a specialized headache center for evaluation by a headache specialist, who can then make recommendations to your local primary doctor or physician regarding management of your headaches.
Thank you for this opportunity to answer your questions, I hope you find the information I have provided useful, good luck.