Best sex position while TTC with retroverted uterus?

So a few years back I've been told by a doctor during a pelvic exam that I have a retroverted uterus and that is totally normal anatomical variation. A couple other doctors over the years have told me the same thing, but being that its been almost 9 months ttc, I can't help but wonder if my tilted uterus is the cause. Does anyone with a uterus   that tilts backwards have a encouraging story/advice? Were you able to conceive naturally? Also what is the best postition for intercourse to maximize chances of conception? I've been told by one doc to put pillow under the hips, another doc said it doesn't matter. I've tried this for a couple cycles just for the heck of it, and didn't work.