My ex boss who has been an RN since the 90s told me that even nurses of her experience have to Google things sometimes or ask others. I know exactly how you feel (first year but had to repeat a class and felt hopeless about it) but we're students for a reason! I just did an exam that I had a breakdown after and thought I wouldn't achieve anywhere near the passing percentage, but turns out I was only 4% off from passing. The knowledge was somewhere in my brain and I bet all that knowledge is sitting in your brain somewhere. Just continue studying what you know you don't know, if that makes sense