u dont have to wait a month to lift ur hair, if u do it urself 2 weeks is long enough just keep washing ur hair, if u put a bit of baking soda in ur shampoo and wash ur hair with that ur hair will lighten up some, before u color it again to a lighter color so that the process time doesnt take that long, also make sure that if u do lighten ur hair at home to use a toner aftwards, b/c going from dark to light ur hair goes through stages.. u will have more or an orange tint to ur hair when trying to lighten it from a darker color. anyhow u dont have to wait a month 2 weeks is long enough, since u only colored, not when u lift ur hair u should wait 3 weeks before adding anymore color to ur hair. if in doubt always go to a salon