Hai mama! Placenta previa memang boleh terjadi, but the good news is banyak yang resolve on their own by third trimester sebab uterus terus membesar, a few of my mum friends had this news at 19 weeks and it shifted by 32-34 weeks, so jangan risau dulu! Best thing is follow up dengan your gynae regularly and avoid activities yang boleh trigger bleeding, tapi honestly this is something yang kena monitor closely dengan doctor ja, so ask lots of questions at your next appointment okay.