When you say you feel stressed I read it as you feel scared. I think you were of the belief that like a magic wand becoming an RN would remove doubt. Why do you think it is called practicing medicine? You need time to mature in your field. You obviously have skills or you wouldn't get "excellent" reviews. I don't know anyone who doesn't worry they may have made a mistake. It kind of goes with any job where it comes down to a decision that needs to be made. Some decisions, like in the medical field, involve other peoples lives. But equally stressful may be the decision a judge has to make about putting a child back with a "reformed" parent. You can't run from your worries or you will run from your life. On the sea when the waves start to really kick up the Captain will turn his ship into the waves because a wave that hits from the side could capsize the ship. Being a nice girl is fine but know your limitations. try saying the following some time instead of carrying the weight of the world on your shoulders; "I would like to help you with that but I have to do this or that" or "I have not been trained for that". It is ok to not have the time or the skill necessary to complete every task. To like nursing or anything else you need to lighten your load. I am talking your expectations of yourself. I sincerely doubt that anyone else's expectation are anywhere near as high as yours. If you doubt this ask your boss. If you want to be secure in your job follow the above advice. Don't worry about your job, they will tell you if you need to improve. My bet is your performance is fine and the sick calls will subside. That will be good for you and your employer. Don't forget to enjoy something outside of work. I would suggest some martial arts training as it will give you confidence and a great workout followed by 15 minutes of stretching while listening to some soothing music. Lastly, cut back on the cafeine if you are a heavy drinker of it so you can calm down some. Good luck, let me know how you make out.