I was doing some research on what causes spotting several days before AF in perimenopausal women, and I ran across this very interesting article about PCOS (which this doctor prefers to call Anovulatory Androgen Excess), and her recommendation for treating it. She does not believe it should be treated with BCP, but with Cyclical Progesterone & Spiro.
http://www.cemcor.ubc.ca/tools/pdf/H...gen_Excess.pdf
The entire CEMCOR website is very helpful. It offers several daily dairy forms that you can download and good information about all phases of a women's menstrual cycle.
http://www.cemcor.ubc.ca/tools/download.shtml#diaries