I had the same problem last year and it went away after three months only to return ten days ago after I moved my head while lying down then all the symptoms seem to have came back . The pain is worse when sitting down and better when walking or lying down . It’s a form of pressure on the left side of the head with a feeling of borderline dizziness(not vertigo ) last year I went to a neurologist who said mri is fine . And sent me to Migräne therapy witch I didn’t go to  . Could this be from my neck ?  I know I have bad posture. How can I make this go away