My original color is dark brown. However, I am 54 yrs old so have lots of gray. I've been getting blond highlights. Last night, I attempted to darken my hair with Revlon, Colorsilk, #47, medium brown. My hair turned out almost black. Can I attempt another color today to lighten the effect? What color / product should I try? Can I go to a salon today and have highlights added or, is it too soon for that? Please help.