hey, i started feeling kicks same time as you which was amazing as i was sad to find out my placenta was anterior. my placenta was also laying low at my 20 week scan but i had another scan at 24 weeks and it moved up by then. it tends to move up as your bump grows.
I had a low lying anterior placenta, it had moved by my 32 week scan x
The vast majority (over 90%) move by 36 weeks xx