mucus plug?

Holly

okay so I was having contractions yesterday that were 3-5 min apart and confirmed by the nurse she also told me that I was 1cm dilated and 80%thinned I'm still contracting today and after I was sent home I lost a piece of my mucus plug then a smaller piece today as well is it normal to loose it after being checked for dilation or should I be excited this could be a sign? 37+3