Ovarian cyst is milky watery discharge normal when it ruptures? how long does the discharge last?

May not be related: When an ovarian cyst ruptures, the fluid that comes out of the cyst is generally straw-colored or clear fluid. That fluid is inside your belly & doesn't come out of your vagina as a discharge. If you are having discharge, that may be an entirely separate issue. If you are having discharge that has a bad odor; is causing itching, burning or irritation, i suggest you have your gyn take a look at it.