Hi Eve
I understand your situation. First, it's important to determine how confident you are about the content of the study and preparation materials and second how confident you feel about your experience and application of this to the exam areas. Leaving aside the practice exams for a minute, take time to self assess where you are without reverting to a cramming or relying on temporary memory knowledge of the materials. The exams are one indicator of readiness and often the scores may not necessarily reflect your knowledge of the content, based on the questions in the practice exams. You need to be as calm, relaxed and ready for the exam knowing that your preparation was sound and your knowledge base of the materials is solid.