My advice is stripe everything back in your life . Just hit a little reset button . Get rid of phone for a few days and take a holiday . Go back to basics when you had no worries and have a think what the main cause of anxiety. What if you lost all your possessions now where would you end up? At the parents house? Overthinking is a sign of intelligence so ur stuck with that unfortunately but it’s amazing how many little things are causing anxiety that you could easily get rid of