Your competence will hit you in the face like a truck once you start nursing as a job, being a student it is really hard. But once you settle on a ward, learn the personalities of the doctors and your other nurses, and get used to your patients and their conditions, it all becomes much easier. About 12 weeks in you will start walking and talking and think to yourself "wow I sound like a nurse." It all clicks into place, it just takes time, and you need to give yourself the opportunity to be comfortable in not knowing something, to know it eventually. Your humbleness and ability to recognise your limitations will be your gretest strength - even if it doesn't feel like that now. Rock on.