My husband and I are trying to get pregnant. I was on ortho tri cyclin lo and stopped in back in oct '07. I have had a period every 25-28 days since I stopped the pills, each lasting about 8 days. My last period was feb 15 and lasted 3/4 days. I have not had a period since feb 15. I have taken multiple home pregnancy test and had the dr draw a blood pregnancy test, all negative. It is day 40 and still no period, could I be pregnant or is there something wrong?