It's so hard to wait for the big day when you hit the third trimester! Especially because every new pain is confusing and can make you wonder if you're going to go into labor soon. Signs of impending labor include pressure low in your pelvis or lower back. This could be a sign that the baby has dropped. You may also get period-like cramps that are the beginning of real contractions. Any change in discharge could also mean you'll go into labor soon. Sometimes a very sudden urge to nest, diarrhea or sharp pains in your pelvis can also be a sign that labor is approaching.