So I am currently 2 days late on my period, and have been experiencing some symptoms such as headaches, lower back ache, nausea, extreme fatigue... This morning I took a pregnancy test and waited about 4 minutes and nothing showed up... I had to rush to work so I couldn't wait their the full 10 mins. When I got home later, I noticed a dark thin line in the positive section of my clear blue test. So then I decided to take another test, this time digital. However that one came back as negative... so now I am confused as to weather or not my period is just abnormally late. (I should mention my periods are fairly regular 27-28 day cycles) or whether or not I actually am pregnant... please help!