Please say something to the senior staff there, get out of this job or get a new preceptor quick! I am now a qualified nurse, but when I was a student in the NICU, I had a mentor that sounds EXACTLY the same as your preceptor. I had never looked after tiny babies before, nor even changed a nappy on a child so small, I was scared stiff! She near to the point bullied me, was RUDE in front of the parents and other staff, talked about my mistakes to other staff, made me feel so small. I wanted to leave there and then even though I was 3/4 of the way through my training. She sucked up to the head nurse who thought she was wonderful. Like you, I didnt say anything as I am naturally quiet and don't like to cause a fuss, but other staff noticed how rude she was to me. I hate to think how many others she has done this to, it has put me off working in the NICU forever as I just don't have the confidence (this woman kicked it out of me)..however somehow I managed to get a new mentor who was kind, patient, talked me through everything one step at a time and helped me through my time there. Please please find a new preceptor, or even just another member of staff that you trust who you can talk things through with, you don't have to put up with these people, find someone who can support you and help you turn into the great nurse you know you can be.