Am I starting labor?

I’m not sure. I started feeling very slight discomfort last night, i wasn’t sure if I was putting symptoms in my head or not. I slept like crap. In the middle of the night I woke up and felt like I had to go to the bathroom, (#2) which is weird. So I went. Then this morning I was woken up by a definite contraction, stomach was a rock and I had lower abdominal pain. Then when it was done I had to go to the bathroom again. I’m not sure if it’s something I ate? Or early labor? Anyway, I’m sitting here relaxing, drinking water and I felt like I had to go to the bathroom AGAIN! So I went, and when I was done, more lower abdominal pain. It’s been about 40 minutes since the one that woke me up. I also feel achy in the sides of my lower back which is more constant rather than coming in waves. Could it be??