I know how it feels, but you get used to it. About a year and half ago i was desperate for a job, i had at least 3 or 4 interviews and i felt that my stutter fucked up everything. Somehow i started to feel more careless about finding the right words or answer perfectly during the interviews, and that made me feel more confident, not having a real expectation at all and understanding that are things out my control for now, so i acepted. Dont blame yourself, youre young and brave.