Mucus Plug or discharge?

Im definitely not going to take a pic and post it on here. But im 35 weeks and lately when im at work (constant walking) I will feel little trickles of something coming from my vagina.

At first I think its my water breaking. I go to the bathroom and my underwear is covered in white discharge like usual and some discharge is dried up and tannish. I wipe and its mucusy (like if you blew your nose, but with a slight greenish color). No, I do not have any type of vaginal infection. My doctor checks me for that stuff. Doesnt itch. No odor. Nothing. When I get home my underwear leakage has turned to more crust. That makes me think its just a lot of discharge. I wipe again and its mostly pee on the toilet paper with a very very small amount of the green stuff again.

I always thought the mucus plug was brownish.

Any ideas or someone that has had this before?

Any other info i can think of is im 35 weeks with my first. He is head down. This "leakage" has happened while at work for the past two days. I will definitely be wearing pads in my underwear from now on.