If you have this mid cycle then it could be normal vaginal discharge
resulting from the effects of estrogen. If you have itching/burning with white discharge, it may be a yeast infection. If you have a gray, watery discharge with fishy odor, it may be bacterial vaginosis. To find out what you have, I suggest seeing a gynecologist for examination. The will do a wet mount and see if there is any organism under the microscope and they can also test you for any STDs like gonorrhea and chlamydia.