Hey if it makes you feel better in any sense, I was accepted into a PhD program even though I was stuttering like crazy. Yes Anxiety makes it so so much bad. As you have a bachelors in speech therapy, I do know you know a few techniques to lower down your stuttering. But one thing that has worked in my favour immensely is that try to feel control over the words you are saying and speak with authority. Slow down, think and talk. Usually when your brain moves faster than your mouth, there are delays which make it so so much worse. And it happens more due to anxiety! Interviews and shit. Best of luck!