At 22 I have developed a mild to bad stutter which the doctors have no idea..

At 22 I have developed a mild to bad stutter which the doctors have no idea.. Over the past month, I have developed a stutter which I have never had one in my life. I am 22, stable job who are being very supportive, live on my own trying to get on with life, then suddenly over the course of one week, I developed a stutter! It was very mild but by the 5th day it was horrible, stuttering at every single work. I have been getting tests / scans and seeing doctors for the past 3 weeks and no one has been able to give me any answers while ruling out everything they can think of. After doing my own research, I have helped myself get through this with breathing control and forcing myself to talk in away to compliment the stutter. I am coming here today, after reading a lot of your stories for help. If anyone knows / have had the same experience, please talk to me as I would like to know more and help me in tips on how to get through everyday life. TLDR: I am 22, I developed a bad stutter and now I am looking for tips to get through this!