Diziness in closedspace, headache, High

Sir,For the past 5 months I have headache,pain at left head above ear and left chin below pulling sensation.left hand shoulder join pain and left thumb pain.My heart rate is also sometimes increasing.recently frequent numbness to legs and hands my brain mri shows:Impression: 1)Prominent cerebellar folliae. 2) Sulci appears prominent in the bilateral cerebral hemisphere- 3) Prominent cysterna magna-Fs/o Mild cerebral and cerebellar atrophic changes and cervical mri is attached as screenshot.Very Recently new problem is I feel sudden diziness when I enters in a closed room where is less air and sometimes open place also feeling diziness and head ache.Is my brain mri serious for me.Is these symptoms because of brain shrinkage...the diagnostic technician told me my brain shrinked as ten years older than me .my age is 33.I started yoga .for the past one week left side chin pulling sensation is not there.kindly suggest me.what to do.will i die because of brain stroke... kindly guide me.