Aah kesian, sakit punggung memang common dalam first trimester lah, hormones membuat ligaments jadi relaxed, so support kat spine jadi kurang stable, tenga-tenga pulak sebab body position berubah kan. One of my mum friends kata she got relief by doing gentle stretches dan making sure sitting posture betul, tapi honestly the aching only really settled after she saw her gynae who boleh advise proper prenatal exercises untuk strengthen core. Dekat midwife clinic atau GP boleh tanya pasal safe exercises or maybe physio referral, sebab tiap orang lain sikit depending on body condition.