A few weeks ago I colored my hair darker than my natural and it came out dark brown almost black. Yesterday, I went to a professional to get it lightened and they had to bleach it and then they applied a toner and color. It came out dark blonde or very light brown - kind of brassy. I would like it to be medium brown (close to my natural color). At this point can I use a drugstore brand to darken it to a medium brown or because of all that has been done - will it turn a funny color?

It really depends. It might turn out the way you want t.I would be a little bit careful though all of this dying and bleaching could really do some horrible damage to your hair.