My mind feels like its not there (hocd)

Since the very first time this hocd BS started my mind feels like it is covered with dust.I just cannot think properly,even as I'm typing I'm frequently misspelling things which does not happens that much.I cannot think logically,every single one of my thought feels like its covered in fog.it's not only mi hocd thoughts,it affects all my thinking.I cannot use logic.I just feel anxiety.Can somebody tell my how to stop this?