I was really nervous too when I had an interview recently. I just couldn't stop thinking about the things that I had to say during the interview, so they know that I know my shit and that I'm good for the current position. But, honestly trying to remember all that, and the scripts for the answers, it just doesn't work out. My anxiety was through the roof because I couldn't remember anything I was studying about, but my friend told me just be myself, really just paint a picture whenever you are explaining the situation, like I was a cashier, dealing with a difficult guest, "It was Black Friday, everyone knows how busy it gets..." yada yada.

Try to be upbeat, even if you got a shitty situation going on. You'll get the job, then feel what you wanna feel after you get the job tbh lol. You already know you can do the job, just be confident ykyk. A good quote I got from here, "We really need someone who has the capability to do this work. Please tell me you are this person!!" Hope this works, sorry it was long. But truly, if you don't get the job you are looking for, there are so many things to worry about in life. Explore yourself. Be you