I pulled this off a site. and yes it would show up on a CT Scan... I'd go and see your doctor if this continues to happen. Anxiety can make potentiate the feelings of these problems, if a problem exists. but there are sooo many variables. I wouldn't jump to the conclusion of a brain tumor.
I got this from Hopkinsmedicine.org -
"CT scans are a type of X-ray that creates a three-dimensional picture of the head by scanning the head from multiple different angles. A computer combines these images into a detailed, cross-sectional view that shows abnormalities in the brain, or tumors.
CT scans can be helpful in diagnosing some types of brain tumors, especially those near or involving bone. They can also show swelling, bleeding, and bone and tissue calcification.
This is often the first scan that will be used, especially in emergency situations."