I have a white milky discharge but i have taken monistat for 7 days....so im ruling out a yeast infection. but what could it be?

Vaginal d/c: Tough to say without an exam and testing. Some yeast infections are resistant to monisat and may need stronger Rx meds.

Bacterial vaginosis: Bacterial Vaginosis is caused by the bacteria Gardnerella. It is a common sexually associated infection. Patients need their doctor to perform a pelvic exam and wet prep. Then identify the signs of BV. Treatment is usually straightforward and usually with good result.

See your doctor: it could be a STD or bacterial vaginosis.