I know you don't have a ton of time, but I would recommend UWorld! I purchased it about one week before my exam. I was only able to answer about 500 of the practice questions, but there are 1800...
That sounds exactly like how my format was! 75 questions, about 20-25 SATA, 2 exhibit, and a bunch of prioritization! I left feeling like I failed! But I just found out I passed!!! You will