You may also have been experiencing Braxton Hicks contractions for weeks now, but how do you know when it's time to call your healthcare provider? If there is a change in the frequency of contractions, it's probably a good idea to call. You might also notice some brown, pink, or red discharge signaling the fact that you have lost your mucus plug, and your water may also break. These are all signs that labor is starting and it's a good idea to let your partner, and your healthcare provider, know that it's time!