LSD or any psychedelic should not be taken lightly, but that's a good piece of mind, I know exactly those thoughts you were having. I feel like sometimes I forget these axioms I have already learned, like nobody being completely fluent or nobody actually pays close attention to small stammers and hiccups in speech. The fear is irrational, but it's the neurological disorder which inhibits those irrational fears rendering them rational. It is all very convoluted and I am certain no drug can completely cure a speech impediment. Anyway, back to positive thinking, thanks for sharing man!