Pms And Mucus Could This Be The Mucus Plug?

Could this be the mucus plug? - pms and mucus

I am 37 weeks pregnant and have been to the toilet and it was rather a small mass in my ceramic white under management, could be the mucus plug (I thought it should be dark in color?) If so, I can at the work in the near future? Besides, I had stomach cramps and PMS day.