Hay, mama, ganyan din ang experience ko when I was 39 weeks, ang sakit sa puso at likod plus yung tusok-tusok sa baba is usually a sign na malapit na talaga, but hindi pa guaranteed na open na ang cervix kasi may moms din na ganyan for days pa bago talaga mag-start ang labor! Best way to know for sure is puntahan mo ang OB mo para ma-check ang cervix and make sure everything's okay, especially since you're already at 39 weeks, they'll be able to tell you kung ready na ba talaga or kelan expected. Kaya mo yan, mommy!