My advice is to kill the nurse or coordinator in charge of scheduling with kindness and calm them everyother day to "check the status" of cancellations....yes, I am advising you to STALK the office.
That is what I did. When I went in for my consult, I was given the soonest appointment they had, which was Aug 17th but after I got approved on 6/21, I kept calling and asking if there was any luck with getting a sooner date and by the 4th call...she finally said YES and now my surgery is on Monday 7/26.
So, just be sure to be nice to the people in the office and keep calling! They may be able to move you up and if that doesnt work, I would speak with the doctor directly and explain that you would prefer to have surgery with her versus another office but you need it done before school starts.
Good luck!