I have been trying for a baby for three years now. I have pcos and endometriosis. My doctor did an ultra sound and asked if i had had sex in the past week and i told her yes. So prescribed me letrozole and he exact words were "I'm positive you'll get pregnant this month. Call us with the good news." Well my period is supposed to start in two days. I took a pregnancy test yesterday and it came back negative. I normally have cramps that start about this time and I don't. Do my chances look or sound good for this month? Or was the first test right?