Hi there. Thank you for your question. I will be helping you out with your queries
With what you are describing it is almost certainly tension headache.
It is HIGHLY unlikely to be anything serious at all
It is not cancer of spine or brain
The spreading pain is because your muscles of the neck and spine are all tense because of anxiety or tension.
Let me know if you have more questions.
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Let me know if you have any further questions. I would appreciate it if you rate me for my services when you are done asking.Kindest regards