Labor?

Brittany • Mother of 3 beautiful girls!
I am 37 weeks today, and I feel like I am literally about to start my period soon; the abdominal cramping and cramps in my lower back/hip are beginning to aggravate me! I was standing on my feet for about 20 minutes cooking dinner, so I came to sit down, that's when I noticed the pain. I tried laying down, but trying to get comfortable seems impossible at this time. I am having an intense contraction as I write this out right now. With my first pregnancy, labor started with the period like cramping that became intense as the day progressed. What do you think; could I possibly be in labor?