You need to rest alot , more a lot than usual.
No heavy workloads or carry heavy stuffs. No sex during pregnancy.
If you are walking, feeling pain must stop & rest.
Must feel calm and easy.
You may experience spotting too.
Are you working?
Get approval from gynae for HL. Before you give birth & ML.
https://sg.theasianparent.com/placenta-previa/
Hope it helps