So im 37w 6d. Today I had my membranes stripped. Walked for awhile, came home and used my breast pump, bounced on my yoga ball and took 2 tablespoons of castor oil. started feeling period like cramps and after about an hour turned into contractions. After a few hours of contractions I started timing them using an app on my phone. They are all lasting about 45 seconds and are either eight, eleven or thirteen minutes apart. i keep doubting this is it, BUT when I am in the midst of a contraction I feel like this is definitely the start of something. Wish I knew!