I have constant fatigue,head heaviness ,cold hands and feet accompanied with tingling throughout the body.Occassionally, the symptoms also worsen into a painful nauseating headache.And on very rare occasions ,while travelling in the car,my nausea and tingling have also aggravated to the point of making my hands numb and clenched into fists,which usually resolved within 5-10 minutes after getting out of the car.These symptoms have been present for 20 years.Recently I have been diagnosed with low vitamin B12(234) and mild esophagitis.Please help me on this by providing valuable suggestions.