Remember that the beginning is the most difficult part of the whole process. It's normal to start out slow. For instance, I spent my first month or even more reading only Biochemistry. By the 4th month I was done with all subjects.
If you have Kaplan videos, watch them while holding Kaplan notes, and annotating them. It's more interesting, albeit a little more time consuming, than just reading alone.
Get away from all distractions.. TV, Internet, Cell Phone, Parents.. even your girlfriend if you have 2.. whtever it maybe.. 2 chapters a week is wayyy 2 slow and your pretty much not going to learn anything.. Just seclude urself in a study room which you only use to study and you'll be going much more faster and will notice your studying will become much more effective.