Hi. I have PCOS and a beautiful 3 year old daughter.
I was diagnosed in late 1998. In January 1999 I began low-carbing, and at the beginning of February, added Metformin. We conceived sometime around the first of March without the need for any additional fertility meds. I too had been taking provera to induce a period and in fact, had taken my last round just before we conceived. I was waiting for my period to start post-provera when I discovered I was pregnant. BTW, I weighed 324 at the time of conception.
You may find that LC alone will cause you to resume ovulation. If not, before you take Clomid, you might want to look in to seeing if a trial of Metformin (aka Glucophage) will do the trick. It certainly worked for us.
The best way to make sure you're ovulating is to keep a chart of your basal temp. You can have a period without having ovulated, but obviously you can't conceive without ovulating. Without blood tests, a chart of your basal temp is your best way of knowing whether or not you're ovulating on your own, and/or with drugs. And if you are taking drugs, it will help you know if they're working.
Is conceiving with PCOS as simple as taking a few months work of Clomid? Sorry, no easy answer there. Every woman is different.
But there are lots of plus-size mommies out there, and lots of mommies with PCOS.
Be sure to check out the Plus Size Pregnancy website at
http://www.plus-size-pregnancy.org/
It is a wonderful site and was very helpful to me.
(My birth story is there under moms' with PCOS.) And of course the PCO Support site at
http://www.pcosupport.org/ is must reading.
Good luck.
Stephanie