Don't worry bud, I was in the same mode for the past week, take a day or two off, maybe you're starting to burn yourself out! thinkin marathon instead of sprinting, keep it slow and steady, you'll pick up speed as you go along, I plan on giving it in Jan hopefully also, and I do believe we have enough time, if there is one thing i've learned from a lot of ppl who have taken the step is that "everyone" thinks there will never be enough time to study for it, whether its 6 months or 8 or even a year, I started 3 weeks ago, then I took 2 days off, refreshed myself, now i'm back in Killer mode again! make sure you take a day off here and there, so you keep yourself refreshed, and I started working out again and playing soccer, it keeps me motivated in the sense that I know I have to take time out, so it means I need to be more organized to complete whatever I have to for the day, make a schedule for the next day the night before and follow it as much as possible and then evaluate how you did before you go to bed and make the schedule for the next day....its helped me so far, hopefully it will help you too....
another thing that is helping me out is that i've made lists of things I need to have memorized (LTs, cytokines, complement cascades, all the CD4 counts and landmarks and the Key associations in the back of
FA) and have them up all around in my room on the walls and even a couple on the ceiling above my bed, if nothing else I know that i'll look at them at least once a day, at first it will take you a min or 2 to scan through the pages but eventually you'll run through them 15 secs flat! then replace them with something else that you find in your thorough studying that you need to have memorized, and rotate the old ones in once in a while so you don't totally forget what they are....has helped me all throughout med school since my memorization is pretty bad, with this method however I remember exactly where that list was in my room and it kind of jumps out at you once you've looked at them for the upteenth time!
good luck! study smart not hard!