Cramming for Macro?

My school doesn’t offer AP classes, but it allows us to take AP exams. I signed up for the physics as well as Macroeconomics. I’m a junior, and I’ll still be busy with school and contests until late next month. The problem is I haven’t touched my macro book at all.

My friends have crammed for APs before, and they say it should be ok. But is 2 weeks enough to get a 5 in AP Macro? Last year, I took micro, but I’ve heard that macro is harder.

Thank you in advance!