You should get on uworld. Trust me, you won't regret it. I did the same, I had kaplan qbank and finished about 70% of it but I felt like I didn't learn much except how to memorize the weirdest details. You will see the difference when you go to uworld. You did 45% of uworld, that is still a couple of hundred questions which is good enough. I am in my last month of prep with more than 50% of uworld left and there is nothing I regret more then not doing it sooner. I have learned so much more from this qbank. Please don't make this mistake - I'd rather do uworld twice than finish a complete round of kaplan qbank.