On February 20 I started having a dark brown discharge turning into light pink colored over 5 days. Since then my nipples had been very sensitive and I felt tired all the time. I had what felt like the flu for one day two weeks later but never any morning sickness. I took two pregnancy tests, one last week and one the week before--both negative. Today is March 10 and when I urinated this morning noticed bloody discharge and it looks and feels like a regular period--bright red/pink. I am experiencing some cramping as well. And strangely, my nipples no longer feel sensitive. What is going on here?