Watery discharge ?? Can someone help

Jahnia
Today I started experiencing a watery discharge along with period like cramps and clear mucus like discharge . And also lower back cramps out this world. The watery discharge  soaked my underwear I had to change them !! Never had this happen. My period isn't due until next week and I've already had my ovulation cramps. I don't assume it's pregnancy symptoms considering it may be too early but I did have sexual intercourse a day before ovulation last week .