I dyed my hair red a couple of weeks ago, but I now want to go dark brown.. what should I do? :):):)

Well you need to leave it a couple of weeks first, dying your hair too often will damage it badly. If its only a semi permanent, then you should be able to dye over the top once it fades a bit

I need to do it before I go back to school though

Well then you need to go to a hairdressers and get the colour stripped. Or you could bleach your hair and dye over the top if your really desperate