Im not going to tell you it's nothing....But Its "probably" Nothing, I have had a clear mucusy discharge in this preganancy, so far as well. It wasnt as thick as a mucus plug, but it was stringy (sorry for the TMI). When I started to lose my mucus plug in my first pregnancy I was around 36 weeks and it was like "REALLY THICK". Your probably just draining lol, I know it sounds weird but if you Google it, you'll see its completely normal to "leak".

Dont worry too much, but I would say if you really think its that abnormal (out of control) then I would call my dr.
You might find this to ease your mind a little.... I hope I could help!
http://www.babycenter.com/0_vaginal-discha...regnancy_270.bc