CM Q please TMI but No picture

Just • 2 girls & baby girl no3 on her way 😘
Morning everyone...I've just woke up the past with CM that is extremely watery, I mean running down my leg when I stand up watery. I'm on cd13 due to ovulate Tommorow. Never had this before, well last time I did was years ago. I've recently just stopped smoking and hopeing my fertilty has risen due to this as well so. 
​Anyone had this? If so what does/could it mean? 
​Many thanks x