Abnormal CT Scan at 31

Hi,
I just recently had a CT scan for frequent headaches.  The report came back that I have atrophy near the vertex and that this is uncommon for my age (31) so they are sending me to have an MRI for further review.  After researching Cerebral atrophy I am very concerned something serious is wrong.  However, I don't have any other symptoms besides headaches which my doctor says is probably not related to the atrophy.  I just had my second child 6 months ago.  Does anyone know if child birth or weaning from the breast could be related to this?  Also I have never had a seizure or any other neurological problem.  Could this reading of the CT scan still mean I have nothing to worry about?
Furthermore I had an MRI of the Brain when I was 20 but it came back normal.  Is this something that might have changed or can atrophy show up on a CT scan but look normal in an MRI?
Thanks and I look forward to any insight.

[Dr Santos]

Hi,
How are you? Cerebral atrophy describes loss of neurons and the connections between them. Diseases that cause cerebral atrophy include: stroke and traumatic brain injury; Alzheimer’s disease; Huntington’s disease;  and other hereditary diseases that are associated with genetic mutations; leukodystrophies, such as Krabbe disease, which destroy the myelin sheath that protects axons; mitochondrial encephalomyopathies;  multiple sclerosis; or infectious diseases. Symptoms of cerebral atrophy may include dementia, seizures, and a group of language disorders called the aphasias. Try not to worry at this point especially if you do not have the above symptoms. Let us wait for the MRI result for a more detailed evaluation. Take care and do keep us posted.  Warm regards.