While you are not yet a doctor, you will find more and more attendings will introduce you as "Dr. _____", and the nurses start asking you for more orders and what to do. I'm a 4th year in the Medical ICU now, and the nurses commonly are asking me what I want to do on my patients and if they can have orders for something. I'm finding also, that my attending is leaving those decisions up to me more often. (Whether or not to give Lasix, whether to order certain tests, eg EKGs, labs, ultrasound, and also making me responsible for calling consultants ect)
Yes, as you advance more in your training, the less you get referred to as medical student, and more as doctor, but make no mistake, until your coat says M.D., you are not yet there.
Mossjoh