I blew my interview!

Yeah, I just had an interview for an ICU fellowship, which is optimal since I want to be a CRNA. I currently work in a hospital as a CNA in ICU/PCU, and have done so for two years. This potential employer was supposed to meet me at our job fair, but unfortunately, our program did not advertise this facility well, and I missed out. I finally called, but missed the open interviews by about two days. I emailed the nurse recruiter on a Fri afternoon, and she called within about two minutes! We set the interview up, and unfortunately, I had only three days to prepare officially. And of course, I had other stuff going on such as work, an upcoming exam, and clinicals. I actually ended up arriving late for the interview d/t clinical obligations. Once I got there, I totally did not represent my true abilities, I froze. I would not hire me! Is there any hope for me? I think my resume and experience and grades are above average, but i KNOW the interview went sub-par. What should I do? Should I call/write/email the ccu supervisor and make excuses? Or just thank them? Or just wait? Thanks!