Hi thank you for trusting HCM I read carefully your symptoms and understand your concern It will be hard to determine the right diagnose without further test and examinations First which is more important is to exclude heart problem It doesn t seems to be the cause but better be careful It can easily be done by an EKG Then a neurological examination will define the cause of your headache and neck Anyway I don t see reason to be worried too much but further explorations are needed Hope my answer will be helpful Please feel free to ask for further information or doubts Best wishes Dr Eris Ranxha Neurologist