Hi Cind, I am in the same boat as you.This is my first cycle on Clomid. I did the provera just recently to get AF going, and it worked great. Clomid was alright, I was pretty grumpy though. I was taking 50mg as well, days 3-7. I am currently on cd9. And I am in the same boat as you for weight issues. I have read that plus size women do, and can get pregnant so there is hope for us. There is a post on the Trying To Conceive message board that I found reassuring. It's called "Real-Life, Plus-sized pregnancy stories for women with PCOS" by KatCarney. There is also a website I found that deals with Plus-size pregnancy as well, resources, info, and what not. I thought these might be helpful for you. I know I found them useful.
http://www.plus-size-pregnancy.org/
Well Cind, I wish you all the best and lots of babydust.

Amy