White milky discharge on and off with light cramping 3 days before period?

See GYN: you may have a yeast infection that is presenting as white discharge. It is a common complaint for vaginal infection/discharge Best wishes Dr M

Depends on discharge: Some mild white vaginal discharge is normal, and is likely due to the body responding to hormones. If the discharge becomes excessive, foul-smelling, cottage cheese-like, or associated with itching or discomfort, you might consider bringing it up with your doctor, since it could be due to an infection.