I had the same! I would advise you to go back again. Its because the way Venlafaxine works on your dopamine and your speech motor nerves. You get a better control of your diaphragm which helps you to maintain a fluent air flow around the vocal cords (as if you sing). Go to https://stuttering-delferro.com to get rid of your stutter once a for all. Its the diaphragm you need to train. I am 100% cured for 10 years now. Never expect this to be possible