Dr. tomorrow

The authorization for this "IVF" cycle has gone through and my medications were all ordered and delivered already, and I am to begin a birth control pill (weird, huh?) on the first day of my period. As we all know, the standard length of a cycle is 28 days, but I'm rarely regular... anytime from 23 days to 38 days seems to be typical for me. My last cycle was only 25 days, so quite honestly I expected to get a period while I was on vacation the end of March. Nope, here we are, Day 37, and nothing. Argh. Tomorrow night I have an appointment to have blood drawn, sign all the consents, and be taught how to do the medications, and if I'm still sans period I'll be asking what can be done about that!