hi, u said u checked 2 yrs ago, what did the doctor say? I Think u need to go to doctor once again as u said u r feeling foggy when u turn ur head . pressure effect of nodule depend on its size,mobility,pain or painless or tender, its origin ie is for eg like origin from skin/lymph
node/nerve/ artary/vein or any other soft tissue
, this is diagnose only on physical examination.