instructor problem

Ok, so i'm guessing that this issue has been discussed many times, but my problem is a little different. I'm in the end of my second year out of four now, so in clinical I know what I'm doing (most of the time). I've had some confidence problems in the beginning, but they resolved after second semester. This semester is a total nightmare for me! I have a tough instructor, and it wouldn't be a problem, i had tough instructors before. However, every time she grills me, instead of being confident (b/c most of the time i'm on top of things) I'm on the verge of crying. With her I start doubting all my actions and after I talk to her I feel very incompetent. She is very old fashioned and some things that she is very picky about having things done her way. I try to meet her expectations but sometimes its too much (i just run out of time, b/c other more important stuff needs to be done). Anyway, I have two weeks left, but I feel like i'm going to have a nervous break down. Im just very exhausted and i feel like i'm starting to lose passion in nursing Any tips would be nice, cuz i'm completely out of ideas!