HELP!

Ok so I only have about 3 weeks left till I am due and for a few days now I have been noticing when I wipe it's like a yellow or a very pale orange color. Would it be my mucus plug? I never lost it when I had my son cause I was induced so I'm not sure what to look for. I know you can lose it over a long period of time too. I was just at the doctors too, but they didn't check me at all. I just need a little insight.