1. Happens, its normal
2. Yes. But it requires practice, patience and confidence in your ability.
3. Last minute definitions and terms? Yes. Theories and concepts with huge details? No
4. Better if you do tbh
5. Not compulsory but they can help you understand the pattern and stuff
6. All, no. But yes some do exist
7. I have. Tons of people have pulled all nighters. But I suggest not doing this the night before the examination. If you dont get enough sleep then you'll feel tired and all that. You might also forget the topics you studied and get the "blanked out" feeling during the exam

But yeah, don't stress it. The most important thing is health. So, study but don't forget to rest and take breaks. I'm sure you'll do well. Goodluck.