Dyed my hair

So I dyed my hair last night, I got just a box blonde and i dyed it and it didn't do to much to my hair, my hair was brown and it made it light brown. So I got a box today that's platinum blonde and i don't really wanna wait a week or whatever to dye it. I take biotin and i have really good conditioner. Would it be okay to dye it again today? Has anyone did that? If so how'd it turn out??