Throat closing help needed.

Throat closing help needed. Hello everyone I had a question about my stutter. Whenever I stutter it feels like my throat tenses up and it makes it impossible to saying anything but random noises. It’s really annoying because lots of the time I’ll have something to say but won’t and it’s causing me a lot of mental problems. Sometimes I’ll be able to talk without a problem and other times it’ll feel impossible to talk normally. Does anyone know any exercises to prevent this? Thanks for reading this and have a blessed day.