I'm glad you're giving yourself two weeks before your exam, but remember to keep it in the day (just for today). That means, quite simply, that you won't drink today; let tomorrow take care of itself and tackle that day when it comes, not before. This is what has worked for me.
Don't worry too much about the studying right now. Your entire focus and your priority should be on your sobriety. I hope you keep an open mind and look for some face-to-face support as you begin your journey, because it is precisely when you start feeling physically better that the old thinking that you can drink "normally" comes calling. Remember that this disease is cunning, baffling, powerful, and it is my belief that one cannot recover in isolation. Let us be there for you. Let others be there for you, too.
I wish you the best. You CAN do a fantastic job on that exam by the time it rolls around, but first things first.