Could I be in labor??

I was woken out of a sleep with lower back pain at about 12:35. I went to the bathroom and had the runs. When I was on the toilet I got really bad pains in my back and lower stomach. When I went back and laid in bed I got the same pain 2 more times. It's now 1:10.  My stomach gets pretty hard, and baby is moving. Not sure if this is the start of labor or it's the baby just moving or some sort of stomach bug. I'm 36w 6d. This is my second and I honestly can't remember if this is what it felt like or not when I went into labor! Lol 😁