I was using liquor to get rid of social anxiety and shyness and learned to play guitar hoping that it'll help me be more popular and sociable. So I was spending quite a lot of time in various companies drinking, partying and singing, everything was alright, I was unemployed and careless. Then alcohol began affecting my speech and I quit. Now I am in my 40s, occasionally smoking weed and feeling quite good, though stuttering is still with me. Weed makes me relaxed and fluent, alcohol was helping in the beginning but then it worsened my condition. Everyone's systems are different.