Wow, I can't believe both of your docs want you on it for 12 days each month!!! Yikes!
I've had four different docs give it to me to start AF and they were split 50/50...two of them had me take it for 5 days and the other two had me take it for 10 days.
Well, it doesn't do me very well in the side effect department so I decided that 5 days was good enough for me

I get hot flashes, terrible mood swings and have a hard time sleeping on it. (similar to my clomid s/e).
My AF usually starts 2-3 days after my last pill, no matter how many days I've taken the pills but it can take up to two full weeks for some people.