Oh my GOODNESS!!!!! I need my resort changers and QUICK!!!

As most of you know, I am a teacher

. You also know that we recently moved from the Jersey shore

to Northern Virginia. Because we moved the very end of August....(Literally days before our Disney trip) I did not pursue employment as a teacher not knowing when closings for both houses would be completed in enough time to give a definite start date. While at Disney last year, I booked our FD bounceback for August 29 - September 6 of this year and figured I would change the dates if need be.
Fast forward...... I've been substitute teaching waiting for the school I want to teach in had the position I was interested in......and they do....now.....I have made all of my ADR's and my entire spread sheet for this year because school doesn't start until after labor day BUT teachers have to report on the 30th!!

So I try to switch to a week before...NONE of the dining I wanted is available... THEN I find out that all teachers new to the district have to report on the 25!!! I literally stopped in my tracks. I haven't gotten the job yet by the way but am hoping for it.... WHAT should I do? Should I change now to....say....the 16 - 24th?? How can I redo my entire spreadsheet??

I have to CHANGE EVERYTHING.....I need your help.....

My DH says don't panic. I am trying not to....