I had a bad stutter and had intense shame. I found it hard to say my name or my parents name. My advice to you would be to learn to love yourself. You need lots of self compassion and patience. I have been stammering for 25 odd years. I just recently finished a public speaking class and I not shy approaching people and I readily talk to them. I have more of a speech block due to childhood trauma. Psylocybin mushrooms helped me have a break through. I microdosed on my first few classes then I weaned off it. They helped me heal. I can't afford to do therapy. I have been working on my self and am happy with where I am. 15years ago I would not have believed that I can do what I am doing today.