I understand how worrisome this is. I used to worry about an aneurysm too, but my sister died from one at the age of 37. It was about thirty years ago when the surgery was much more invasive, and she didn't survive it.

Aneurysm headaches are very severe from what I recall, and tend to get worse if you lie down. I remember that my sister's was so bad she had to go to the ER for pain meds. They gave her some and sent her home but it didn't help, so she went back the next day with even worse pain and they finally figured out what the problem was and she was transferred to a neurology hospital out of town.