anyone else with back labor?

I don't know if I'm in labor but since last night every ten minutes I would have back pain that lasts from 20 to 40 seconds still going on till now. They feel like when I have a bad period and get that achy pain in my back. But they say contractions are suppost to feel very painful and unbearable so it's not horrible but it hurts and is uncomfortable... am I in labor?