Quote Originally Posted by Wendy
There's some kind of prescription a doctor can give you to bring on a period, too. If you can get it, you could take it a couple of weeks before the ride to get the period over with before it starts. Then it's just a one-time deal that doesn't have the long-term problems the pill can cause.
Thanks for the idea - I'll definitely ask my doctor about that too.

I already know (from painful experience) that riding the day before and the first 2 days of my cycle is pretty miserable. Plan A, I guess, would be to have the entire ride re-scheduled, as Trek so helpfully suggests but since that *may* be difficult to arrange, I'll look into Wendy's suggestion, then the OC, and finally just "be prepared"!

I appreciate all the suggestions!