Low blood flow to womb

Yesterday I visited my doc for my detail ultrasound

I am 21 weeks pregnant and i have biocoruate utrus.

She told me the blood flow to my body is low and i can b dangerous in future for baby if it remains low for baby.

I am so much worried she said no medicine will work now we just have to monitor u closly after 15 days that baby growing well or not.

Anyone exprience the same with any reason???

Please help