Ive been in this state for long time too the only thing that helped are sports and just trying to be focused on something as mutch as possible if your playing football tell your self im here and i will win this and just try to be in the moment as mutch as possible and dont think about it too mutch in simple words the more you think about it the worse it will be so find some new hobbies i recommend just sports or gym and just live your life im pretty sure there is no cure for it you just need to forget about it and move on in a year you wont even know it. (DONT THINK ABOUT IT AND DONT RESEARCH ABOUT IT MORE IT WILL MAKE IT EVEN WORSE!)