Hope I'm not asking a silly question but have you by chance tried metformin or metformin and clomid? I too have pcos and it took 5 years to get pregnant with my daugther.
My story.....First we did clomid and that did not work. Went to a fertility specialist and took injections for a year Not 1 positive....I took a year off and asked my regular docfor metformin (RE did not even suggest it) and my doctor was reluctant. Started off on 500, then 1000, then after 1 1/2 months at 1500...SURPRISE. Something else to keep in mind, I think PCOS'ers have more miscarriages b/c of low progesterone. I almost lost my baby b/c of it and had to be on supplements for 12 weeks but she was born perfect! If I had not called my RE I would have never had the blood test to know my level was too low to stay pregnant..but luckily you will be monitored.
I know I am new but I wanted to wish you the best of luck...infertility is SO hard.