Mucus plug lost , how long till labour ?

Hey ladies, this morning I had the mucus plug ( jelly with a little blood) and I'm wondering should i go and get checked or wait for contractions to start or water to break ? I'm 39 weeks and 2 days ! I have alot of pain at night in the lower belly and my lower back is killing me with irregular contractions or maybe they are false contractions ( not sure ) !