To be or not to be?

So here I am in the second to last semester of Nursing school.  Scared out of my freakin mind.  So far in to fail, to close to graduation to give up.  So first test, passed. Second test, failed. Third test, failed.  Therefore, I have decided to quit my job and put in 300 percent of my time to try to make it through.  But I do have to question, am I supposed to be a RN? If so why am I struggling so much.  I am still waiting for an Ahhhhh haaaahhhhh moment.  Is it ever going to come?  If so, it needs to hurry.  I don't know if my grades will let me hang on long enough for my brain to catch on.  If I do graduate, and get my license, I honestly don't know what I will do!