Talk to Gynecologist on Gynaecologist Advice

Salaam! I want to consult about my sister who is 6 months pregnant but have heavy bleeding since 4 th month of pregnancy. Doctor says that baby is all right . Movement of baby and everything is all right but bleeding does not stop. It's her 4 th pregnancy and she lost her first two babies but third one is all right and he is two years old now but the thing is that her bleeding does not stop.Kindly give me your suggestion about what should we do now?