Hi and Welcome to Yorkie Talk  

  ...I am so sorry that your first grooming experience was not a positive one.  Bailey's first trip was bad as well....She cut more off, though not that much, but more then she had been asked, his face was pretty much shaved and I had told her I was growing it out....He was 4 months and he is on his way next week to a different groomer.......Bailey acted sullen for a day or so after his bad experience and I found that putting a little sweater on him made him feel a little more comfortable, and he came around , started playing more and eating again.....
Try to keep your chin up, I know its hard but she is such  a beautiful little gal, and in no time at all it will start coming back.     
