Self-Studyig AP Calculus BC

Dear College Confidential,

I have signed up to take the BC test this May, and I haven’t even taken the AB class yet. I feel like I’m doing really well (Getting fine scores on the review tests. Free responses don’t seem that bad either) and I have a mentor from a university nearby who teaches Calculus and tutors me. However, the AB teacher at my school highly discouraged me from doing this. Also, obviously there are differences in AP and college syllabus. Any tips or resources that might help me get a 5?

Thank you!