Alhamdulillah doktor dah check and baby okay, tu yang penting! Bleeding dalam second trimester memang boleh happen, ada beberapa reasons macam cervical changes, cervicitis, atau even just subchorionic hematoma yang sering resolve on their own. A few of my mum friends went through similar scares at 20-something weeks and everything turned out fine jugak. Since doktor dah reassure you, just rest more for the next few days, avoid heavy lifting and intimate relations untuk masa ni, and report balik kalau ada heavy bleeding atau severe cramping. You're doing great by seeking help quickly!