Brain strange sensation. Life threating?

From Last 1 and half month , I am facing very strange Brain issue.  I am facing sudden heaviness( not headache), Like Foggy, Random Pin pain, Spasm pain on anywhere on head. Sometime , It stay for 4-5 hr , then sometime vanish. I have noticed that when I am busy or Tensed for something else the ONLY pin pain sensation stays. I am always taking about this day and night since 1 and half month Checked our GP BHMS near mine house….he did basic neurological test and said ..Coulld be never or anxities. I am taking b12 tablet since 1 month Neck has mild pain but not very strong. Did eye test and it came normal But when this heaviness comes then Right eye feels stiff. I took video consolation with Neuro dr and he told me it could be mine anxieties. Advised to get CT or MRI but Does all these symtoms really life threating? Because I know if there is brain cancer then No cure ..>So better I will take mine own life. I am really confused.  Please suggest Once.