Contractions?

Beth • 26 🇬🇧 Mummy to Elsie 19/05/19 & Tommy 18/06/22

I’m a FTM so really don’t know what to expect when labour starts. Just had pain that nearly had me in tears, felt so tight all the way round my front, ribs and back and lasted about 30 seconds. Was it a contraction? And now my lower back is just aching 😩😭