Hey Kewl, it's tough to get knocked down a few notches when you're studying a new area or field in nursing. Just remember that you can do it, and that most of those ICU nurses don't know squat about the area of nursing you are coming from (ortho?). My suggestion is to eat the humble pie but study hard, and remember you CAN do it.
One time when I took my CCRN exam I was feeling like I didn't have to study too hard (I'd taken it and passed so many times before-I thought I knew it!) so I didn't study until just a couple of nights before the exam--- BIG mistake! The exam was really tough, and I thought I had probably flunked it because it was so tough! I did pass, but it taught me a lesson that even though I've been in critical care nursing for so long, things keep changing and I have to study on an on-going basis to keep up with the changes in critical care.
Some people may find it easier to stay current in their particular nursing areas, but I do need to read and study-- I'm not able to absorb the info by osmosis!
So, work on your weak subjects, and GOOD LUCK!!!!!!!
And welcome to ICU-- I hope you enjoy it!!!!!