Thanks for writing to HCM.
The symptoms seems to be more of neurological origin, although possibility of a cardiac disorder changes with profile of patient which you have not mentioned.Cervical spine
x-ray is a poor modality to look for cervical spine pathologies. I would recommend you to see a neurologist
or orthopedician to get your cervical spine evaluated. If they do not find anything significant then an internist will help you in evaluating the possibility of other diseases including cardiac disorders.