Not sure if this helps, but my feelings in my head feel like something weird just comes over me, in my head, like a quick short buzzy fuzzy feeling, almost like sand has been poured in my head or like when you stand up really quickly but sometimes without the dizziness.
Feels horrible and realy sets off my anxiety. Mostly happens when I'm sitting down or when I have been having an intense moment of stressful thoughts, work or just conversation. An awful feeling that I hate, my doctor is adamant it is anxiety and has prescribed me beta blockers, which looking back I was etting this feeling every day, now it seems to be a few times a week.
Hope that helps a bit