M.R.
If you have been diagnosed with PCOS, you should seek the assistance of a fertility specialist, particularly one who deals with reproductive endocrinology.
PCOS works kind of like this: each month about 12-20 'primary follicles' in the ovary are 'selected' to potentially become an egg. While one of the follicles is lavished with fluids and hormones, it never gets the opportunity to be released from the ovary because the pituitary gland does not secrete enough hormone to allow it to 'emerge'. If you've seen an ultrasound of your ovaries, no doubt you've seen the 'pearl necklace' so many doctors describe as PCOS: lots of little black dots on the ovaries indicating follicles that never made it out of the ovary. Poor little girls are trapped inside the ovary and never get to join the party!
I have pretty bad PCOS, and rarely had periods from puberty on. In high school, college, and beyond I was on birth control pills simply to have a period each month (it is best for the lining of the uterus - endometrium - to be shed at least 4 times per year). When I informed my doctor of my desire to bear children, because I had PCOS I did not have to wait the usual year it takes of 'trying to conceive but no results'. Simply put, my brain (the pituitary gland) doesn't play nicely with my female reproductive system and never really sent the adequate amount of hormones to 'feed' a follicle to make it a viable egg...and on top of that, the pituitary gland never sent enough hormone to allow me to ovulate.
All the charting in the world, all the temperature taking, and all the mucus checking would not have made a bit of difference. (this is not the case with every woman, but was with me)
I started out with Clomid, did two cycles of that at a low dose and nothing. Then three cycles of Clomid at a higher dose and still nothing. Next was a few rounds of injections of Follistim at a low dose and while I began producing viable ova (eggs), they weren't being released. My doctor then added HCG (human chorionic gonadotropin) to stimulate the release of the eggs. I did two cycles of that, got pregnant on the second cycle but miscarried at 7 weeks.
Oddly enough, after two years of trying, I managed to conceive naturally without drugs (I was just giving my body a break from the drugs). My doctor believes (and I firmly believe as well), that even though I was not on the drugs at the time, they really helped to 'synchronize' my system (think using paddles to restart the heart) and get things into a 'rhythm'.
This could be a long process. For me, it meant a strict drug regimen and visits to the doctor 3 times a week during the 'medication' phase. I should have bought stock in home pregnancy tests! Just remember to be patient and that things happen for a reason and the way that they are suppose to happen.
Feel free to send me a PM if you want to talk more.