sorry i'm a little late to the party, but if you are only spending your time studying for the MCAT, then i think you definitely have enough time. i did all of my MCAT preparation in a month (literally 10+ hours/day, EVERY day. definitely not ideal, mind you, but doable), and it worked out fine. one comment though - i see that you're taking tests now. i would definitely recommend saving most of the tests (at least the AAMC ones) until you're completely done with the content review. the reason is that, at least for me, the practice tests were used to familiarize myself with the types of questions being asked on the exam. if you don't yet have a handle on the content, then the practice tests become less of a measurement of "how you think," and more just a test of "what you know." after each test, spot check the topics where you missed questions.
on my test, the biological sciences section was pretty evenly split between bio and o-chem, so definitely be confident in your orgo-problems-solving abilities.
and we got pencil & paper at my testing center.