Low lying placenta/placental migration

Rebecca

I had a low lying placenta, but by a few weeks ago it had moved to about 3cm from my cervix. I’ve had light bleeding off and on. A nurse on the phone said it could still be due to the placenta? But I’m confused. I thought if it was far enough away it wouldn’t bleed. Is it from the migration? I couldn’t get answers from her. I’ll ask my doc soon.