I was so excited after what seemed like a succesful IVF transfer (two quality blasts transfered day 5) and now I've lost all hope

This bleeding has been going on for more than 24 hours now (no sign of slowing down).
I talked to my RN on day 6 and she tried to make me feel better saying that progesterone (I'm on Crinone suppositories - not shots, aspirin, folic acid, & dexamethasone) cause bleeding in many women and my bleeding is probably being made worse by the fact that I'm being treated for a yeast infection (identified on transfer day, meds started the day after transfer).
Everyone is telling me not to lose hope but I just can't imagine I could end up pregnant after all this heavy bleeding. I'm scheduled for a pregnancy test on Wednesday and I'm preparing for the worst.
I'm 31 heathy DH is 33 healthy. We have male factor / unexplained, TTC for 3 yrs, 3 failed IUI's 2008, 1st IVF Aug 2009