Is it possible that the anxious thoughts you have block out/filter anything else from getting through, rendering your brain feeling empty? 

I struggle with thinking about anything other than what I am doing in this exact moment, anything else of anxious thoughts. It leaves me feeling like my head is blank but the tension I get across my head weirdly makes it feel blocked and stuffy. 

Is there any science behind this? Am I not having normal everyday thoughts because they just aren’t there, or because they can’t get through?