What semester are you in? If this is your 1st or 2nd I wouldn't panic just yet, especially if your CI hasn't given you an indication that you are going to fail. Is nursing what you really want to do? If it is then relax a little. If you have never been in a medical setting before then you are not going to be comfortable in one for awhile yet and that is okay. Most NS instructors understand that you will not get it all right away, but if you are doing well in class you will catch on. I had many times this last semester I was sure I wasn't doing well enough,(and I have 5 years hospital experience under my belt) and it turned out I did fine! Don't be so hard on yourself, you may be doing better than you think! Good Luck!