In my observations feminine features tend to be rounder faces, short nose, long lashes, thin and or arching eyebrows. But this isn't the case for every woman. If you'd like to, play around with shortening the nose and bringing the chin up a bit to create a roundness with the jaw, you could find yourself creating the desired look you want by moving these features or just practicing with different pieces/sketches. Really there is nothing wrong with your art piece, it is very good C: 
good luck ^-^