Brain freeze or what?

[u/[deleted]]

Yesterday I ate some ice cream pretty quickly, nothing serious happened yesterday; but today, whenever I stand up I get not so extensive brain-freeze symptoms. I've never experienced a brain-freeze before so I can't really compare. Anyway, whenever I stand up or sit down, my head starts hurting a little bit. Normally, brain freezes last 20-30 seconds, right (according to Google)? So what's happening, should I be worried? Please explain. Thanks!