Set up (or join) a study group - Nursing is a completely different way of thinking than I was used to and I felt completely lost, stupid and despondent on many occasion through nursing school. The tests are different than any you've experienced and you have to learn how to think 'perfect world' scenarios, you have to keep yourself from over thinking it and talking yourself out of the most right of 3 or 4 right answers. Working in groups helps you think it through and gives you the opportunity to quiz each other, teach each other and learn from each other.
Don't doubt your intelligence.
It's tough, but it's not impossible. Your grades were better than mine and I got through an accelerated program (less than a year) as a second career (which is code for "I'm old"). You can do it!!
**Remember** Nursing school is preparation for the NCLEX. Nobody ever asked me what my grades were... Only if I passed the NCLEX and got the license. A's, B's or C's.... Just Survive!
I highly recommend the Hurst Review before graduation. I wish I had listened to the lectures during school instead of just after to prep for the NCLEX. It's expensive, but it's worth it. If money is tight, find a friend (or a few) and you can share it. I put the lectures on my iPod and listened to them on the way to/from class/clinical. They really helped me understand some basic concepts that I had struggled with during nursing school.
Get a massage, take a walk, give yourself a break when you need one. Cry when you need to (just don't do it in front of your instructors, if you can help it) and get rest every chance you get.
Hang it there!!