So I'm 3 days late on my period & I took a test today. It was a cheap one from target with blue dye. I thought I saw the faintest line but wasn't sure. Then I came back about 20-30 min later and there was a vivid blue line. I know it was outside of the window but don't evap lines only show with no color?? Boobs are a little sore, felt dizzy all day today but other than that no symptoms. Any advice??