I am no medic but it sounds as though you may have a (retro)backward tilting uterus, if you experience pain, which makes getting pregnant more difficult apart from the PCOS.
I suggest going to the GP and asking for a referral to the Intermediate Gynaecology Clinic, where they deal with all kinds of similar issues. My daughter suffered from PCOS and finally, after years of heavy painful frequent periods was prescribed Spironolactone which has help enormously-she is not trying to get pregnant though!
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