Not making light of your situation and trying to find a positive spin on your situation, but from your description --if your office manager left abruptly (i am assuming no 2 week notice) and also had months of data misplaced or not entered may have given you an opportunity to fill her position with someone more responsible. Also no need to pay for unemployment. When this situation has occurred, in my 18 years of practice, at first seems formidable often times in retrospect has been an opportunity for a change for the better.