Uterine Notching result on fetal test

Hi moms..I need some advise I just done the fetal test for my baby today. Iam 20wks pregnant, 1st time pregnancy. The result show that there are uterine notching on left & right side. Which my doctor explained it might affecting the baby intrauterine growth as the blood not go smoothly to the baby, and I might develops preeclampsia even though my BP taken was within normal range 114/80 (my BP always on lower side 100/60). At this moment doctor only advice to continue my 100mg (1,5tab) aspirin. I also read on internet, some moms with this condition are also taken calcium tablet. But not sure why my doctor didnt advice me to take this. Has anyone here experience this also? Is it true thay if you have preeclampsia, early delivery the baby is often recommended? Is it more calcium supplement intake will help to prevent the preeclampsia? Is there any food or exercise can solve this notch uterine? Please help to share, as Iam very concern about this today 😣. 🙏🏼🙏🏼🙏🏼