For anyone who is curious, here's my update- I called the RE's office and got a call back from the nurse. She said that my lining at my last u/s was very thin, so they consider my spotting to be AF (you could have fooled me!) and they told me that Monday was CD1 and I should start my Clomid today.
Yippee!! They're not sure exactly why my lining was thin, if it was from the BCP or something else, but they didn't seem too worried about it.
Yay, I'm happy
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Rachel

(23)
DH Tom (28)
Diagnosed 1/5/02 (symptoms since 1991!)
TTC #1
off BCP 1/20/02
Clomid 50mg & prenatals
1st round of Clomid starting 4/25! Wish me luck!
http://www.FertilityFriend.com/home/10ca4/