May be your blood pressure going lower side because you already suffering from fever and cold. In this condition energy level goes down, body feel lethargic. Take liquid died more mix with some salt. Like butter milk.
Are you taking some medicine for your bp? As it’s high for your age. This pain can be because of high bp. You need to check your CBC, thyroid profile, lipid profile, an x-ray of cervical spines from some lab.
Hello, homoeopathy offers very good treatment for your problem and without side effects or addiction. Please take homoeopathic medicine ignatia 200 daily in the morning (5 to 6 pills each time) for 7 days. Please let me know the response of the medicine and give feedback. Your condition needs comprehensive treatment for a permanent solution. You may opt for private consultation with me through Lybrate.