Typically your mucus
plug is tinged with blood... I personally have never heard it being just clear... when I was pregnant with my daughter I had that same discharge
a few times... your discharge
can change a lot while pregnant... Mine went from watery one day to thick and white
in color the other, then turned around and it was clear and stringy... gross i know... but I'm pretty sure it is just normal vaginal discharge
... you do create a lot more while pregnant to prevent infection...