I'm a little confused, please give advice!

Ok ladies, my period is 2 days late now.  A few days ago I posted a pregnancy test that was determined as a Evap. I got some blood work done that came Negative but today I used the bathroom and when I wiped I had some bright pink spotting so I thought I was starting my period but then I went back to bathroom and nothing was there. I'm confused because blood  test are accurate and can determine pregnancy 7 days after ovulation. I'm asking for advice because I have no idea what to think or do. I have symptoms such as sore and tender Breast and I can feel my cervix move which is normal for PMS. Leave thoughts thank you!