I had my light brown hair dyed a darker brown colour last week with my usual hairdresser. She did a nice job but I just can't get used to the dark tones. Feeling I look older and washed out. Really keen to get some caramel and lighter highlights through it. How soon can I go back without a) wrecking my hair and 2) offending hairdresser whom I do really like for cutting and usually colouring!? Just this time not quite me!