Braxton Hicks or Actual Labor?!

Rudolph

Hey moms, I'm a first timer who is 31 weeks and 4 days pregnant. My due date did get moved up to December 21. I lost my mucus plug Saturday Morning after a night of extreme pain. Well as of a few hours ago I've been feeling what I think are contractions. Can anyone explain the difference between Braxton Hicks and Actual Labor contractions before I make a wasted trip to the hospital.