Reading out loud on my own always helps me mentally, because when I do so I don’t stammer at all, so it gives me a breeze of fresh air to hear myself talk fluently. It also helps me recognize I do have a voice and if I can speak so well on my own I can surely take that to social situations and my day to day life. I recommend you take a brief moment of your day, everyday, to read an interesting book out loud for a few minutes and really savor in those words and pronunciations until you feel comfortable going faster and faster. The speed level of your reading should be changed as you need or wish. It’s just some fun practice!