How can I stop this severe stutter at least a bit?

How can I stop this severe stutter at least a bit? So I've been stuttering for all my life, it was a big problem for me but as of recently its gotten much worse, for about 2 months now I've had many more problems with my stutter, usually I would stutter mid sentence or just not say words right cause they sounded weird when I stuttered, but now I have this problem where I just can't start talking, I try to speak but I just can't, only a noise comes out, I tried to stop several times to calm down, breathe in and try again, but the same thing happens, sometimes the first few words of a sentence come out and then suddenly I stop at a random word and can't continue, before this I could talk almost fluently with my parents or close friends, but now I can't even talk with them without heavily stuttering, also when I can't start a sentence or something, I do weird movements with my head, little sudden movements like moving my head up or just random stuff like that, I've been told that it almost looks like I have a problem like autism or any other mental problem that makes you do these weird sudden movements, I've tried to search for a speech therapist, even though I've been to one before but for some reason the closest appointment time is in 2 or 3 months from now for all the therapists I've looked at, I have school in one month, a new class, new classmates, new teachers, and I cant imagine how I could possibly communicate with them or even introduce myself to the class, I block and stutter when talking to my family or a close friend, so I don't know what I'll be able to do in front of like 20 people that I don't know, I've tried to look online for tutorials or tips to stop this heavy stutter of mine, but I can't find anything that fits my problem, so that's why I came to this subreddit, maybe someone had the same problem as me and could help me, I cry myself to sleep almost every night now thinking about the fact that I can't talk, that I can't start talking and it's really destroying me mentally, if anyone has some tips or just things that I can try please please tell me, I've also been thinking about some things that I probably can't write here, I'm 16 now and I really need some help with this, sorry for the long text I just wanted to thoroughly describe my problem.