Am I showing signs of early labor?

Jenna • Mother of 1 bubbly little boy, expecting our little girl august 31st!
Im having irregular contractions with back pain and pressure. Then started with diarrhea and vomittng last night. I was checked yesterday and my cervix was soft. I have 30 more days but I honestly don't see her staying in there that long when I feel like she can pop right out.