I was going to suggest the watch and flashcards but you already thought of that, which is good. I actually can relate to you. I've felt that way on the job before. Actually, ever since I've started looking for a new job, I've been wondering about what will happen if I don't know exactly what to do, or if someone doesn't explain something to me step-by-step. I don't think there's anything wrong with you, I think this is very common. Every time you start a new job it takes time to get everything down pat. Especially since you're in a difficult field - nursing. I was doing my phlebotomy rotations in a hospital and I saw how hard the nurse's job was. There are so many little things you need to remember. This goes for LPNs, CNAs, and basically everyone in the healthcare field especially when it comes to direct patient care. Did you say you've only been there a month? It sounds like you're still new. Its okay! I think its really rude of those coworkers to be gossiping about you, they must have absolutely nothing better to do than to act like high school teenagers. Just ignore them. Focus on you.

Instead of feeling like "Omg I can't get fired I need this job" start telling yourself "I don't need this job. I'm here because I want to be here. I'm offering my services to these people who need help. I'm doing this out of the kindness of my heart. I don't need this hospital or these people. I can find another job that would probably treat me better anyway." Take the pressure off of yourself, de-emphasize the anxiety. Come from a place of abundance, not lack. That is the only switch you need to make.

Once you take the pressure off of yourself, you'll start to remember a lot more things. Their opinions of you don't matter. Only yours does.