TMI Mucous Plug or Discharge?

Kelly
I am 37 & 5 days today. I had my weekly checkup yesterday with my doctor and he said I was only 1-2 cm And my cervix was pretty "thick" yet. Today I went to the bathroom and had A LOT of white "discharge" OR "plug." Can your plug just be white? It was way more than I have had thus far in my entire pregnancy, but I'm guessing just discharge..? Was hoping it to be my plug!