The first thing I would do if I were you is get on the AAMC site and see if there are actually any seats left in your area for the Nov. 7th date. I just re-scheduled from Sept. 12 to Oct. 21, and I looked at all the dates in Oct and the one date in Nov, and while there are a few seats here and there in the Oct sections, there are very few seats left in the entire U.S. for Nov. 7th. Depending on your area, though, you might happen to live in or near one of the states that's got a few testing centers with seats left, who knows, but when I looked it was amazingly slim pickings, and I was just looking about 3 hours ago. So unless you want to fly somewhere where there's an open seat and spend the night in a hotel before testing, check the AAMC site and see what's available before you get too attached to a particular date.
Anywhoo, to your question: it's certainly possible to do well, depending on what "well" is for you. The SDN user Spinach Dip famously raised his score from a 3o to a 40 in two months (
http://forums.studentdoctor.net/threads/how-i-raised-my-mcat-score-by-10-points-in-2-months--the-spinach-method.988678/), so unless you're in a really bad spot right now as far as content knowledge, you could certainly do well if you work hard.
Have you taken any tests, looked at any material, worked any passages? It's hard to know if this is possible without knowing A) where you are now and B) what your desired score is.
