My mom would finish my sentences and I'd get mad lol. I'm 19 now, still with a severe stutter but I've learned to deal with it. I talk and don't pay attention how I talk, I feel like that helps. I literally think of random stuff like games and work as I'm talking to distract myself. I'd get in fights in hs when someone would laugh or make stuttering jokes and by mid junior year no one talked about my stutter they just waited quietly until I was done but they were probably annoyed.