I'm 36w4d I have been montiored twice once at 35w for contractions. I was told I was going into pre labor and I was finger tip dilated. Yesterday I went again to get my blood pressure checked and found out I was in active labor. My uterus was contracting every 3-5mins with mild pain in the lower back. I got released because my contractions thinned out and I wasn't having pain after 6 hours of being monitored. I was 1cm and 25%effaced and it didn't change .