I know some people get their period on their own. My Re had me wait (I think 7 days) and then take provera when it did not arrive. It still took me another 7 days after provera to get it.
My attitude with REs at this point is to tell them what I want to do rather than "ask" them. Often times the nurses are working off of a wrote script and don't really think about the big picture or other possible approaches.