In Nevada, no call, no show is grounds for termination. It is strange that nobody talked to you about it.
Do you have a boss? Ask?
Well, hopefully she is good at her job, recognizes anybody can make this mistake (I have, as a full-time employee, thought it was Saturday and it was Friday... I could have been denied unemployment had I been fired). Humans make mistakes. Breathe. I suspect all will be fine.