i recently started stuttering and i dont know why

i recently started stuttering and i dont know why hey guys so im in highschool and before this school year i never stuttered, but now i stutter like a lot, especially around certain people or like when im anxious. i always repeat the first two words of the sentence im trying to say and then ill stumble over my words. like bro i know what im trying to say why cant i say it. is there any way to get rid of this and also why did it even start in the first place. its not like i recently went through a bunch of trauma or something i have a pretty vanilla life. any advice would be appreciated thanks