Speech therapy definitely helps some, not all. You will never know unless you try. But seeing a regular therapist is a good idea too, you get to unleash on someone how you are feeling, should definitely help your anxiety . You are in the middle of puberty too which really makes things more difficult. Stick w the kids who Have your back even if it’s just one. And kids have so many issues at 16 , so many are struggling w other shit, don’t buy into they are strong etc. don’t let your stutter hold you back. Try enjoying yourself more find something you love to do. Do you play sports, play an instrument, go to the gym?