I naturally have dark brown hair, two years ago i decided to go blonde, it turned out to be a nice honey blonde/brown. Then i decided to go back to my natural color, so my colorist used a dark(almost black) ashy brown. After just one washing my color got lighter for a few shades, so i went back to the colorist and he toned me. And now i washed my hair twice and it is already lighter. How many times should i color my hair until it stops fading and is it smart to just do it by myself with box dye( which i have never used before on my hair)