I didn't have long periods, but I had a lot of pain on tri's. That's how I figured out I needed to be on monophasic rather than triphasic ones. When I feel a cyst "pop" I feel it. And maybe a little spotting but no long bleeding like that.
Do you have pain NOT on BCP?
Could this help you any? I'm not sure what formula the one you have is but maybe it could help?
Birth Control Pills for PCOS
Everyone is different.