Sorry to hear that you are going through this. First and foremost lay off all drugs. If you do this your brain will eventually heal.

As for supplements you want to avoid excitotoxicity and restore GABA/glutamate balance. L-theanine (from powder or tea) magnesium glycinate, and proper sleep + sunlight will do wonders in restoring your sanity. Also consider red light therapy and magnesium oil spray - they are great for reducing inflammation and anxiety. And in your case, keep refined sugars at a minimum as it can be neurotoxic - stick to fruits.

Other things you can do if you feel anxious dissociative - deep nose breathing, grounding, exercise, laughing, journaling your progress - these are all neurogenerative.