Wah, congrats on the pregnancy! Memang hard to tell at 9 weeks lah, especially kalau positioning baby awkward at the scan, kadang-kadang shadow or angle je yang buat nampak macam 2. A few of my mum friends had the same worry during early scans, then turned out single baby je, so jangan panic dulu! Best thing is to ask the sonographer directly next scan or wait untuk 12-week scan bila clearer, diorang ni expert and boleh confirm properly. Fingers crossed for you either way!