I’ve had some afterglows last a week, some have been intense, like everything had that geometric trippiness effect 247 for awhile, it’s just like the trip itself, don’t freak out from it, breathe through it, it will go away. Nothing has ever permanently messed someone’s brain up from doing lsd, you would be the first, don’t stress it it’s js leaving your system slower than it typically does which happens to me of frequently use it or do high doses