We all have setbacks in our speech, at times I have doubt myself as well, but then I remmeber who am I and what I've had to go through to get to where I am today. Thats the same for yourself. You made it through HS, the place were most teasing and bullying happens. I recommend you embrace your speech I.e., let's people know who dont already, try to relax your mind .. just know that this block isn't the end all be all. Embrace that new , unfamiliar environment.. I know when you feel like you got it under control and then BAM.. you start stutter worse today than ever before its sucks/frustrating/depressing , but youll be ok, you'll make it through.