Tipped Anteverted or Retroverted Uterus

Laura 🇬🇧
Hi all, I am due to ov next week and am trying to research best positions for ttc. I believe I have a tipped uterus but am by sure which way. When I have a smear I have to put a pillow under my bum so they can see the cervix - does that mean it's tipped back (retroveryed)? 
I have been putting legs up and pillow under bum after BD but have since read that retroverted ppl should lye on their stomachs with pillow under hips. Does anyone have any advice on this? X