Diarrhea really a sign of up coming labor?

💖Amanda • Have a 5 year old from my previous relationship. Now married to my true love and baby #2 is due aug 2015
I have been on the constipated side normally ..... I've dropped and lost some of my mucus plug about 2 weeks ago..... I've been having period cramps but they haven't been hard enough to push me into active labor.... So today I woke up and had diarrhea...... Anyone else have this and go into labor within a few days???