is it possible ?

Hi guys. Need a little advice. I'm preg with baby #2 & since last night I have been feeling damp constantly down there. Is it possible to leak fluid ? Like if my water bag is leaking or something ? Or idk what it could be. Any ideas ?? Has this happened to anyone ? I know call my doc but they have an after hours that takes forever to call back and sometimes don't all together. Just want someone to tell me their experience with this if they have any. Thanks