Water leaking?

Amy • Mom to 4 beautiful girls. 3/3/10, 4/27/14, 4/8/17, 3/7/19.

How do you know if your water is leaking? I’m only 13 wks and 4 days, yesterday and today I just feel a constant dampness in my underwear, I think people say it has a certain smell I don’t know what that would be, this is my 4th kid so you’d think I’d be a little better versed in this area, but no...help please.