I just need a confidence build up and help

I just need a confidence build up and help I just had an interview for a club in my school and I feel like I did miserably. I’ve have a stutter from a very young age and currently I’m almost graduating yet my stutter hasn’t reduced one bit, my teachers complain about it from time to time and sometimes they straight up ignore me or they cut me when I’m speaking and it really breaks the little bit of positive mental health that I have. My parents also don’t seem to understand and they keep saying that it’s cause I’m immature and that stuttering should have gone a long time ago but it’s because I’m sooo scared of everyone and everything that I stutter. The only people who have helped boost my confidence is my friends and some teacher who instead of cutting me in my speech they listen. Now back to the interview part, I feel like the context of my interview was good like my answers were great but I just stuttered wayy too much. I built up sooo much confidence cause of some teachers and my friends and it instantly got shattered. When I went to my parents after the interview and I said it went well except I stuttered they literally started scolding me saying that it’s cause I have a mental block and it’s cause I choose to sit in my room alone. They also said that I only stutter when I’m scared but I really wasn’t for this interview, I was infect the most confident I have ever been. It would be really nice if anyone had any tips to help decrease my stuttering, like I’m Soo worried about college and then job interviews and I really don’t know how I’m going to survive in life. Like to me I always think that there is no point of trying in life I f I know I can’t succeed cause of something I’ve had since birth.