Why should you feel like a loser? You made every effort in extenuating circumstances to get where you needed to be, and it just didn't work out. I'm sorry about that.
I understand the taking of a different test at another time, but the deduction of 10 points seems harsh. In my class, one point made the difference in passing for two of my classmates.
Nursing school is an animal like no other. Rules and policies are what they are. I suppose there's a lesson here about preparation and professionalism (which will come in handy in your career). My advice is to accept it, own it, learn from it and move on. You'll be graduating and on your own soon enough.
Best wishes for your continued success!