Is clear watery discharge normal before period starts? Period supposed to start 2 days ago but has not. Been having PMS symptoms. Virgin

The discharge sounds. Like it may be one of the variable states of vaginal secretions during the menstrual cycle. Reasons for missed / late period include: an anovulatory cycle in which no egg is released, marked v or ^ in weight; eating disorder; over-exercising (endurance athletics), travel, significant illnesses, oral contraceptives ; other meds, illegal drug use, breast feeding, hormone imbalances and med problems.
Watery discharge. Watery discharge may be normal. See your gynecologist for a possible culture and treatment for your pms.