Yes—I believe at times I had absolutely none. Then, I have to admit a part of me rebelled always: there is so much more to me than stuttering, and those parts called for recognition. It’s so hard, and some people manage to conquer it, some battle with it always, but I think a good number of us learned to find some peace and improvement. It sounds to be like you could benefit from speech therapy, if only to understand your disfluency better. Techniques ARE helpful, although seldom a cure-all. Then, try not to avoid stuff for fear of stuttering. That was the hardest lesson for me to learn, since I passed on so many opportunities when I was younger. Avoidance is the truly the main killer of self-confidence. In summary, to build confidence, validate the parts of yourself that you love, and throw yourself in life even if it’s scary (it will get better). Best of luck!