I get bad headaches because I have calcium buildup in my head. Ct scan confirmed calcium buildup. I am scheduled to see a doctor. How bad is this?

"Calcium buildup" in the brain is too nonspecific to venture a guess. There are many structures in the brain that can calcify, normally and abnormally. What specifically is calcified?
Difficult to answer. Many structures in the brain calcify. On ct exams it usually doesn't mean anything. Some calcify before we are even teenagers. If you have high calcium in your blood, this is a different story and your doctor will better answer your question.