I be never done xtc but mushrooms had a profound effect on me for months it slowly faded and im back to my baseline now but it had a positive effect on my speech as we as other things I'm curious how many grams did you take I took 7 dried grams I was going for a "hero's dose"of 5 grams but I overshot it by a bit lol also weed has almost no effect one way or the other as far as actual stutters but it does help with the anxiety of stuttering and my apprehensions to talk