My friend had 2 ct scans in December, she had been suffering from migraines for 3 years and FINALLY decided to get checked out! (Obviously no health anxiety there!!) haha anyway, both scans showed the white marks and also showed a tumor. She was diagnosed with an inoperable brain tumor, 28 yrs old, 3 children and 6 months to live. They weren't worried about those spots at all! Said they didn't know how long they've been there and really didn't care.... So I'm saying all of this because I think if there was anything wrong, they would have been more concerned and a plan of what was next would have been lined up immediately. I hope your ha allows you to start thinking positive! I know how scary every little thing can be! Do keep us posted after your next appt and best wishes!