Sayang, kalau ada sakit perut yang kerap dan uri rendah, please go see your doctor or go to clinic ASAP , jangan tunda! Better safe than sorry, especially dengan first baby kan. A few of my mum friends ada yang kena low-lying placenta, and dorang semua kena monitor closely with their doctors through ultrasound and checkups. It's really between you and your doctor to assess the actual risk based on your specific situation, I can't say, but they boleh explain properly and check if everything okay or not. Jangan worry sangat, tapi jangan delay the checkup. Mummy and baby safety comes first!