I haven't personally but came VERY close with the class prior to this one (in all my previous college classes and my LPN schooling I never got a grade less than a solid B/B+. This class I was technically passing with the minimum grade needed (80/B-) but I had to get at least an 80 or better on all the following test, thankfully I did and came out with a B) Sadly, many of my cohorts didn't come out of that class unscathed and will be repeating it (all being great students, I don't think anyone got higher than a B+ and the lower end of B+ is what it actually was). I do have friends (fellow students) in this current class who had failed a previous nursing class. They cried, freaked out and got depressed after they failed. And they all turned it around, picked themselves up and dusted themselves off, and carried on..to pass that class they had previously failed.
If you do not make the grade needed...you are VERY close! So if you have to retake it you will probably do very well as you already have a great amount of information from the previous time you took it. I'd venture to say you'll do very very well.
I'm sure it seems like the end of the world, but its not. You are still IN the program. Many would kill to be in that position. Best of luck to you on your final.