Friend do not be disheartened, things happen in life..and if everything happened the way we wanted , or on the time we wanted, life would be so easy and happy , that it would not be inspirational to live any longer...
Firstly ,do not call your problem a disability..you are just differently abled..and, to stutter is not that a big problem and, you can increase your confidence and work on it for sure....
lastly, dear friend stay patient....let things happen at its pace...you have done your part and now, its the job of the supreme too look into it...
Trust in yourself.... and mark my words if you at 425+ you are making it before November....