I had low placenta. Never had any bleeding. Last check up was mid 23 weeks and my gynae said that the placenta has moved up
Most low placenta would move up around 6-7months
I had the same issue, and thankfully, placenta moved up after 2 weeks bed rest. Try to minimize walking and do not carry heavy things. Don't run, jump, climb!
My placenta was low during first trimester. If possible, have lots of bed rest, don't carry heavy things, walk less. It was normal after 2nd trimester.