Labor? Or no?

Shannah • Married: baby girl born 3/16/19

Can you be in a active labor without knowing it? I have been having contractions for a few days but today they have become more discomforting. I will not say painful but they are definitely noticeable. I noticed that I have started to lose my mucus plug (I think) and the contractions are more active today!

I have a high pain threshold so I just wanna make sure I am still good as I finish our work or should I be preparing to greet little miss.