Aiyooo sayang, I understand la sebab traumatic dulu. Please go to your gynae or emergency room sekarang juga , serious back pain in pregnancy boleh jadi banyak reasons, and you need to get checked properly, bukan guess-guess. Don't wait! Yes, I had terrible lower back pain around that time too, and a few of my mum friends also complained pasal the same thing, sometimes it's ligament stretching, sometimes it's how we walk or stand kat mall. But since you've got that history, you really kena see doctor to be sure everything is okay. Better safe than sorry, kan? The scan showed baby is healthy which is good news, now let's make sure you are too. Go now, jangan delay!