Do something against it now - or you will be destroyed or an addict.
-realize that you're living in a system to kill you and that it's your healthy reaction to generate fear(the rabbit hole goes insanely deep)
-face all your worries and fears especially fears that make you fear that you will react with even more fear
-start doing breathing exercises
-start sorting out the dictionary in you head... see which words you're using and programming yourself with - language/thought often equates emotions and action
-learn that you, and only you, are your destiny's commander
-use math exercises to get back your skill to concentrate on things... start with easy things and up the ante
-be aware that as soon as you start working on your issue it will get worse in the short term... may be hours, may be days
-your brain is a computer and you can, and have to, rewire it through exercise
-your subconscious is the key to all things and bringing some things out from the dark may ease your burden
My tip: read material from C.G. Jung, Christopher S. Hyatt, Robert Anton Wilson, Timothy Leary and slowly let it sink in.
Breathing exercises(Hyatt)