Good on you! I did MDMA as well, and the same effect happened to me. It left a wicked afterglow as well, to the point where the next few days I was rather fluent. Then I forgot the main message, and my subconscious anxieties returned. MDMA made me realize that I didnt have any confidence, and I would fixate over things I couldnt control- including my stutter. This fixation led to my stuttering 90 percent of the time. At any moment you can take a breath, and remember some of that MDMA experience and bring it back in time. Its all about self compassion in the end.