I had back pain for my first labour. I can describe it as a constant pain in the back....whilst still having contractions. Contractions were felt at the front (uterus) but the back pain was constant. Im lucky enough (???) to have had 1 labour with full on back pain, and 1 labour with all front pain (no back, all tummy pain). Im praying/hoping for a front pain labour again.....the back pain just threw me...goodluck.