Signs of labor?

Hey ladies, just need some advice. I'm coming up on 39 weeks pregnant. My due date is September 30th. The last week & a half, I've had cramping. Doctor told me it's normal. He hasn't checked me for dilation & said he doesn't plan on checking until 39 week appt. This morning the cramping was way worse and in my lower abdomen. It comes and goes but when it comes its painful. I get the feeling that I have to poop but then when I try to go it just comes out super runny. (Gross sorry) The pain is even traveling to my back. I'm nauseated and don't feel good after I eat no matter what I try to eat. I haven't lost my mucus plug nor has my water broken. Idk if these are normal symptoms leading up to labor?