Just had a horrible interview

Just had a horrible interview My fluency just completely checked out on me an hour ago. I literally stuttered and stammered on 80% of the words coming out of my mouth until the very end when I speaking informally with the SME on the panel. I practiced. I had notes. I did my breathing exercises to calm down. But for whatever reason as we started getting into it I just fell to pieces. The words, when they did come out, were on point but that was really hard to get through. Now i'm sitting here feeling sorry for myself that my stutter has completely hamstrung my career and I don't know what to do about it.