I need to look like lady macbeth with clothes that i already have what can i do?

If you have a long skirt, or one of those popular long summer dresses that could work, but because of Lady Macbeth's character, I would recommend something powerful like a suit, or blazer with a black skirt. Just try and find something in your closet that says "I control my husband" or if you want to be poetic, you could find something red to represent the blood. So figure out the character, pick an era (modern, elizabethan, disco :) ), then go hunting in your closet, your mom's closet, your dad's closet (maybe for a tie), your friend's closet, etc. Happy hunting!