Hi there =-)
My story began a few years ago, when I got pregnant as soon as we started trying. I ended up losing that pregnancy in the first trimester. I assumed I would get pregnant again right away, but after a year I wasn't pregnant yet. I tracked ovulation very carefully every month, timed everything right, got periods each month, and yet nothing was happening.
One thing I noticed is that after my loss, my periods were shorter - only around 24 or 25 days instead of the 28-30 they used to be. I suspected a luteal phase defect, as a result of the loss. Basically, my hormones were falling before an egg would have time to implant. So even if I was conceiving, I wouldn't know because my period would be triggered too soon.
I ended up on Clomid, and was able to conceive on the first try with that. In addition to using Clomid, I also started using a lubricant called Pre-Seed. I was using it the first time I conceived as well, so I swear by it. If you aren't using that, I would definitely try it out. I also tracked ovulation with OPK's & basal body thermometer. Those 2 things really helped me out with timing as well.
TTC is such a process for some of us, but fortunately most problems are fixable. Figuring out what the problem is sometimes is the most taxing part. Knowing you have PCOS is the first step - lots of women with it get pregnant. With careful tracking, you will hopefully find yourself pregnant in time too. You're not alone. I had a mentally & physically painful couple of years, but I look at my baby girl every day and realize that this path was meant for me, because she was meant for me. It was just a longer path to get her. I wish you the best of luck & tons of baby dust!