Severe headache since 13/11/2018.)

On 13/11/2018 when I was getting up from sleep putting pressure on my stomach (also I was excited and I super from prehypertension) I experienced a sudden jolt in my neck and my head. For few moments there was a burning sensation with a lot of pain in my head and it gradually lowered. But I could feel that burning sensation for an hour or so and for the rest of the day I faced headache. Again when I was massaging my neck during the night the same day that pain in my neck revived.  since then I am facing headache and slight pain in my eyes and facial bones. I also feel that I am losing balance and stability. I fall short of breathe easily and also face pain in my chest. There has also been loss in my appetite. (to add I have preexisting gastric and digestive problems (before 13/11/18).)