has anyone had this happen?

So I am 39 weeks pregnant and for the last week I been having this clear snot like mucus come out. I was wondering if it can be part of my plug I have been losing... I had a appointment last week and my ob did say I was thinning out and I was a half a  cm dilated. And today for some reason I been feeling ton of pressure like she is about to come out I know this is normal, but i also have been using the restroom like crazy. Also when I was laying in bed I get myself get wet randomly and I ran to the bathroom and I wiped and saw that snot like mucus again. Like this is so new to me, I just want to make sure this is normal and I shouldn't freak out I talked to my ob about the pressure and she said it's normal not to worry unless it becomes painful and I can't talk through it.