Good luck today! One thing I remember is that if I am having trouble (and you already have a degree so you're an old hand at school/studying) then almost everyone else is probably having the same trouble! My husband is a genius and an electrical engineer and tells stories of hard classes where he was getting a "C" but was in the top of the class!
My first degree was in sociology (they didn't have criminology yet back then, just a single "new" class :-) and I remember the statistics and research methods classes we had to take and I got a "D" in statistics and only a "C" in research methods (which required computer programs, also no "computers" yet (1971); I had to get a dorm friend to do that portion for me so I could get the info I needed from the computer database but even the results were over my head as far as interpreting in my project; all the Greek letters/statistics :-) My point is that I'm sure you'll at least pass