Although I didn't have the same problem:
I took Physics II during the spring semester (MCAT in April), but people in our class were really unable to grasp the concepts of force, torque, angular momentum, etc...so we didn't get to electricity, magnetism, and optics (most of Physics II) until after the beginning of April. My point...I made a 13 on physical sciences...most of it being physics. Just get a good review book (I used ExamKrackers) and that should give you all the Physics II you need for the MCAT! GOOD LUCK!
It varies based on the MCAT you get. Some are more heavilly weighted toward chemistry, some on physics. On the MCAT I took, there was quite a bit of second semester physics, actually (optics, radioactive isotopes). You can probably learn it on your own in a Kaplan or TPR course, but you need to be confident in your ability to do so.