Malakas na yan, mama! At 27 weeks, yung ligaments mo (round ligament pain) ay tumutulong sa uterus na lumalaki, kaya common talaga ang tusok-tusok na yan lalo na sa isang side, a few of us felt the same thing sa second trimester. But honestly, since it's on both your front and back, better to check with your OB just to be sure it's nothing else, especially pag sobrang sakit or may iba pang symptoms pa.