Yesterday, before my exam, I went through as many practice questions as possible, and incorporated anything I missed into my notes - this included cases not taught in the textbook or lectures. I am a law student, and all our in-person exams are unrestricted open book - we can bring in anything use anything save for electronics.
Lo and behold, I go into the exam, and about 60-70% of it exam is verbatim questions I did last night. I had with me a textbook with those questions and answers in it (this textbook wasn't assigned for the course) because I was planning to use the answer structures from it.
I tried to keep my answers distinct by using some different cases, I retained the same structure and discussed the same issues and got most of it 'right'. I looked at the textbook a few times if I had forgotten something, and also to make sure my answers weren't too similar. It was a difficult exam.
Did I do anything wrong? Will the lecturer likely catch me if it is wrong (they might not want to get themselves into trouble)? Surely it isn't a case of academic misconduct.
I should report it - but but I don’t want to do a supplementary exam in a few weeks as I’m going overseas in a few days. I'm worried sick - surely I wasn't wrong?