Labor symptoms

I have been reading up a lot in symptoms of premature labor and have been reading that you can feel nauseated and have diarrhea before you go into labor. Last night i was having back pains in my lower abdoman, legs, and lower back. I took it extremely easy all day today but am now starting to have really loose stools. Yesterday i felt extremely nauseous. I tend to have my kids early. Have any of you ladies had these symptoms and went into labor and if so how soon after. I dont want to have my baby early but i know the chances are high.