Something wrong with me?

i have the same problem but it developed through irrational phobias, and bad parenting techniques from my parents that killed off almost all my self-eestem and self-confidence. but it your situation is probably different from my situation because yours involves a speech disorder. so im not sure, maybe you should see if you have a fear of other people or if have developed any phobias. or maybe ask your parents about their parenting techniques for you when you were young. hope this helps