Could labor happen soon?

Brittany • Hello! I`m 26yrs old married for 5 yrs we have a 5yr old daughter and 3yr old son .. We are trying for our 3rd child
Ok so past couple weekends I have had contractions on and off was checked at my last appt no dialation.. But now I've had an increase in discharge swelling in lower back and loose stool for 4 days .. Which is odd for me because I am normally constipated and only go maybe once a week.. Could this b a sign that labor may begin soon