Why are you thinking so negatively? You know there are people on this forum who are waiting for so long but still hoping for a positive outcome. Your timeline is going so great and you are worried? You got pre-arrival before decision made, this is a good sign that decision made is positive. The only time you should be worried is when it hits the 1 year mark and you haven’t received any updates and that too you can contact and ask why. You process is going in a fast pace, just have some patience.
But I'm just worried of rejection If by chance I can know then I'll wait happily