Jadelpn is right.
It will come flooding back.
Sometimes I will ask another nurse and they can say just one word and I'm like "oh yeeeeaaaaah... it's because of such and such and that's why blah blah blah happens..."
I would also recommend studying on your own time.
It's much more fun to do this now, as opposed to when you were a student.
I do this a lot with meds. If I don't know a med, of course I look it up quickly to see what it's for, side effects and interactions. When I get home, I can spend more time reading about how it works (which often leads me down the road to reviewing some patho).
Also, if a pt asks you something you aren't sure you know or remember, you can search for that info from a reliable
online source (i.e. Micromedix, Lexicomp) and print that out and go over it with your pt. They get their answer and you get a quick review.
There is so much going on at work that it is easy to have massive brain farts. Do the best you can while you are at work to stay organized (use a brain sheet-- I mean really
use it), prioritize, and take frequent deep breaths to recenter yourself. Ask questions, look things up and spend some time at home giving yourself a little free education.
I look back on my day, think about where I was lacking most and focus on that.
It really boosts my confidence to do this and a boost in confidence really helps me to get through the shift.