Unless your professors are particularly malignant, most of their comments will be attempts to help you out. Never fall in love with a diagnosis. Sure you made a brilliant diagnosis, discerning and integrating facts that others were too blind or hidebound to see. Of course your brilliant detective work will work out and redound to your eternal credit. So be willing to accept that you are wrong, and keep your algorithm alive so that you can back up in good time to correct your errors.
Nobody is infallible, at least in medicine.
Don't forget the ABCs . Remember that the point of this whole exercise is to make patients better. Don't get so wrapped up in recondite diagnosing and treating that you miss the fact that your patient is going down the tubes.