Hello and thank you for your response.
I have dealt with this before. The anxiety
causes tension, we tend to tense our shoulders and breath with our shoulders rather than our diaphragm. When you do this, you cause muscle contractions and knots in the muscles located in your upper back and neck that attach to the base of your skull. When you have these knots and tightness it produces a sensation of a headache with burning, pressure, heat, dizziness
or a combination of the said mentioned symptoms. C1 and C2 are surrounded by many nerves and are the two bones that allow our head to turn and move up and down. They are the axis and the atlas. When these bones become malposed, this can cause discomfort as well. Most of this is an anxiety issue. An aneurysm
would feel like the most excruciating headache you have ever felt in your life. Like you are getting an ax put into your skull. Most concerns would be in your temporal region.
Your symptoms indicate chronic anxiety and tension, not a brain tumor
or an aneurysm.
I agree with the other doctors that have examined you.
I recommend looking into the anxiety relief program called The Linden Method. It has helped many people with their anxiety issues. You show clear signs of anxiety disorder. Fear of death from different ailments and diseases, going to several doctors asking for tests and getting the same answers, there really isn't anything wrong with you. The next step is to address the anxiety, realize these symptoms that you are experiencing, although very real, are not going to kill you and will eventually leave over time when the anxiety has been brought under control. The only way to get rid of anxiety is through training and constant fighting against the urges through breathing, visualizations and repetition. Medications only mask the symptoms and not actually take them away.
I hope this gives you the answers you were seeking and the comfort knowing that you are fine. Any other questions I'll gladly answer.