Duphaston doesn’t stop bleeding

Hello! I’m about 6-ish weeks now, and due to bleeding I was prescribed Duphaston. Twice a day initially but brown bleeding did not stop, and doc increased Duphaston to thrice a day. There is still spotting and brown blood / tissue like stuff when I wipe. Anyone with similar experience with taking Duphaston but doesn’t stop bleeding? And I don’t feel any side effects at all, no nausea, nothing. Is that normal?