Most women start on either day 3 or 5, depending on what their doctor prefers....but I'm a little confused...your doctor didn't direct you on when to start?
im with Heather, didnt you get told what day? im starting next month on day 5....
If you ovulate on your own your ob may ask you to start on day 3 but if you are taking clomid because you do not ovulate on your own you may start around day 5.
Good luck! I hope clomid works for you.