There's still time and chances for the placenta to move. And yes, there may be chances of bleeding so do rest as much as possible. Do make sure to not carry any heavy things, avoid walking as much as possible, no sexual intercourse. Jiayous! :)
On w20 I have same issues too but doc ask me don't worry and it will move up...just no sex or exercise. Maybe considering change gynae? Haha
There is still time for placenta to move up. Try to minimize movement and have more rest during this period of time.
I had low placenta too. Finally at week 30, my placenta went up to normal. Just tk care and dont carry heavy stuff
You still have alot of time. Usually it will move up as your pregnancy progresses.
There is still plenty of time for the placenta to shift up
Naish Rai