Such is the nature of street drugs. The odds of what you took actually being 100% pure real LSD is approximately zero, unless it was directly handed to you by a trained chemist. Much more likely an obscure cocktail of designer tryptamines.
The source is using your brain and probability.
The ease of ordering research chemicals vs the difficulty of LSD synthesis.
I mean, I had LSD from a handful of different sources, as well as psilocibin, and the essential dimension to any of the psychedelics effects I experienced were very similar, and it was only in that one instance that it led to lasting feelings of anxiety.
I do not believe it was the drug itself that messed me up. It was the insights that the drug revealed to me that were the source of my anxieties.
I worked through that stuff, and maybe in the long run I'm better off for it. It's hard to say for certain. One way or the other, life goes on.
This can definitely put some things in perspective.