How do you know when labor is "the real thing" and not a false alarm? This is the question many pregnant women ask themselves, whether it's their first baby or their fifth. Since every pregnancy is different, what are some warning signs that indicate you're probably in labor? What do real contractions feel like as opposed to Braxton Hicks? How should you time your contractions? And what the heck is a "mucus plug"?  Learn more about your ad choices. Visit megaphone.fm/adchoices