Brain Freeze

does anyone experience brain freeze without drinking cold drinks?

recently my brain seems to "malfunction" its just blocked. so blocked that you can feel a cloud of something, could be mucus or something stuck on it physcially, cutting off oxygen supply to the brain and hence I cannot think straight.

A few weeks ago, I had a week of clear clear brain days and it was amazing, I could think!

By that I mean higher cognitive analysis of issues, ideas and even writing skills. I felt SMART haha

But these last two weeks, my brain has been in the "frozen" state again. Not sure why it occurs at such rates. Does anyone out there know what I mean??