I used this shampoo for the first time this morning, I followed the directions and left in for a few minutes before rinsing, then I shampooed again. On the second round I didn't leave it in before rinsing. I am rushing out the door and when I look in the mirror my the white hair on my head has turned YELLOW I am wearing a hat today. . I can still smell a little sulfur too. Has this ever happened to any one else?