This is exactly how I felt!! I mean exactly. So trust me when I say, you probably did perfectly fine when compared to other interviews. I was super prepared for medical, profession related and application questions and got zero of those questions. So I felt like I pulled so many answers out of my ass as far as for all the behavioral questions. I was visibly nervous and had dry mouth and felt like I blacked out for the first 10 mins of my interview
(it got better as it went along, but still..). I mean Im not proud of that but what I'm getting at is try to be more at ease because somehow I still got in! You probably stand a really good chance!