My LMP was 1/22/11 (fully ended on 1/28), I had sex on 1/30, 1/6 and 1/13. Ovulation calculator says I should have ovulated 2/1-2/5, but I had the thick egg white discharge on 2/8. I was due for my period on 2/19, but instead of getting a period, I've had light cramps (consistant from 2/19 - 2/21) and had one drop of blood the night of 2/19. I've also had watery discharge since 2/20 - which feels like I'm starting my period. Is there a high chance I could be pregnant?