I took some EXTREME doses of dextromethorphan or whatever that stuff is in cough meds, and I'd feel weird for days. But a lot of the things you described are what I am going through still. I feel like I am crazy and it has ruined my life. I'd do anything to take it back. I too have a family history of paranoia/ anxiety and that makes the root of the problem unclear. But thank you for sharing. Oh yeah, I see the patterns too. When I look at carpet ir something, I see moving patterns like I'm on shrooms. It's weird lol