Today is my due date

And for the last two days all my early labor symptoms seemed to stop. This morning I woke up at 5am with terrible back pain. It's almost 7am here now. Side note: I have scoliosis so I'm very familiar with back pain and have a relatively high tolerance for that kind of pain as well. At first I thought I had to go to the bathroom, and I did but it didn't relieve any pain. It's a constant pain/ache and it feels like my hips and low back are splitting apart. Laying and sitting feel miserable. The only thing that's bearable is walking and my exercise ball. Could this be the beginning of labor even if my water hasn't broke yet and I'm not having regular contractions? I'll also add that i was 3cm dialated last week on Wednesday at my appointment and he said the baby was really really low.