Hi, I am in my final semester of RN school. I only have 4 clinicals left. My instructor has only just now decided to bring it to my attention that I need to improve or she is going to fail me! I get so nervous when she is in the room watching me that I make little stupid mistakes or forget how exactly to do a procedure. I have always done really well in clinical and I have never had an instructor tell me I might fail. I have been an aid in a hospital for 4 years while I have been in school? I am not sure what to do. I am so scared of failing. Also, now I feel unable to ask her questions for fear of her failing me!
Help!

You need to improve in what? If you don't know, ask her. That's very discouraging to have come so far and then be told that. Has this instructor been a problem before with you or others?