Need advice

I'm currently I'm my 2nd semester of a 2 year RN program. Last semester, I did wonderful. I got a final grade of a B in Fundamentals and Nursing Process 1. So far this semester, I feel I'm struggling a tad. I am currently in Nursing Process 2 and an OB class. So far I'm doing great in OB, but I failed my first exam in nursing process. I got a 72% ( passing is 75% or above). I know and understand that it's recoverable, and that 2/3 of my class failed it. The overall average for the class was a 77%.

But I just can't shake the disappointment in this. I studied very hard for my test. I put in a lot of hours and felt so confident the morning of. When I got to the test, nothing made sense, it seemed. My next test is in 5 days and I'm not really freaking out, but I'm nervous. I want to pass. I understand each semester gets harder, but I want to nip this in the bud. I usually study by skimming through my reading assignments and making notecards, then reading my ATI book, and taking tons of practice exams I find online. But I also have an instructor that used to write questions for the NCLEX. I feel that I might struggle through this semester and I really don't want to. Please help me.

Any advice would be appreciated.