Braxton Hicks or False Labor?

shiloh

Has anyone started having really intense contractions. I had one tonight that lasted for a minute, started as a cramp in my lower abdomen and moved in intensity to my back. It felt like a real contraction like I had with my first so it was a little scary! Anyone had these? Anything to worry about? I am 30 w 2 Days so not ready for this yet!