My hair has been a medium brown color for a while, so I wanted to dye it. I bought dark blonde hair dye and dyed my hair yesterday. You can barely even tell I have dyed my hair, besides the top of my head. My hair basically looks like it did before I dyed it. I want to dye it again. Im kind of impatient and wanted to asap. So how long do I have to wait before I can dye my hair again?