In our program, whenever anyone failed a class (or just withdrew from even one class and, therefore, was taken out of "normal progression through the program"), a semester-long remediation course was required before students could continue with the program. I withdrew from one class with pre-clinicals at night to attend to a family crisis, and although I have a master's degree in a different subject, I still had to take that remediation class. It was a pleasant surprise, because we took study skill assessments, note taking classes, and had to actually use Cornell method note taking on the chapters of our lowest-scored test (whichever one it happened to be).
I had a lot of extra time to take NCLEX review books and I would also recommend that you look into an NCLEX review course- If I would have known how helpful they were, I would've taken it after my first semester. Practice questions were not helpful to me unless they were NCLEX review questions, because our tests were written that way- some of the textbook publisher's practice questions were less rigorous and didn't serve me well at all, so I stopped relying on those. I began highlighting the main points in rationales to questions I missed, and eventually patterns appeared- I was horrible at SATA formatted questions, so I bought SATA books. I was confused with fluids & electrolytes, so I re-wrote the material from the rationales and focused on that during the NCLEX review course.
Several people in my class spent countless hours of time and I don't know how much energy fighting instructors about how "awful" their test questions were. But, they were NCLEX-style. They included select all that apply on their tests, as does the NCLEX. They weren't going to change. So, when I changed the way I studied, I began doing better on our tests.
Some kind of remediation (self-imposed or not) surrounding test taking strategies, would probably help you. If you don't have a remediation to attend there, then I would take an NCLEX prep course and use it as your own "remediation". Whatever you decide to do, I applaud your resilience and dedication. Sometimes, it's not about how hard we work in school- it's about how we decide which tools to use- and I honestly think that's all this is, in your case. Test anxiety and NCLEX style test questions are a pretty common combination for reasons to both fail, and when addressed, succeed. Wishing you all the best, and the energy to keep on keeping on!