Where did all my hair go?

In the salons garbage bin

I got it chopped off today. It was a last minute thing .. I called at 3 .. she had an opening at 5:30. It is way short .. just above my shoulders .. It was when wet past the middle of my back. She thinned it out as well .. I feel so light Gotta color it now .. she said I have lots of gray hairs hiding under the bulk of my hair