Cervix behind baby head...

So I know this is basically a posterior cervix in my understanding. But Im a little confused on what exactly this means lol. Basically was told the baby was super low but my cervix was behind the babys head. But I am 1 cm dilated. Anyone else in a similar situation? Im just worried because with my daughter I was in labor for 30 hours and now Im questioning if it was because of this?

Just curious on what exactly this means really.