Water trickling or discharge? (No pic)

Brittany
So I couldn't sleep well last night and was on the couch. This morning I moved back into bed when hubs was leaving for work. When I would be turning to the side (which I have to do every half hour due to pain in my hips) I would feel a little wetness between my legs, I just chopped it up to discharge or something and that I was tired maybe I'm imagining it. I woke up and noticed it is pretty wet in my shorts and that when I wipe I've got a clear bubbly liquid (almost like mucus plug but clear and not as slimy) coming onto the tissue. It doesn't smell like pee...more musty or like meat or something idk how to describe it-not pee... I'm 40w4ds and just wondering if this could have been my water breaking (in a trickle, since nothing is on the bed and so far nothing else is coming out that I know of-like nothing falling down my legs) or if it's just a (oh lucky me) new discharge since I'm overdue. Also I don't think I'm having contractions...again I really don't know what those feel like (what I think are contractions people tell me they are and others tell me they aren't-so really no idea what to expect FTM). 
I plan on doing a bit more research and calling my dr this afternoon - their office is at lunch right now - so just thought I would check with you all first.
Thanks!