Faint Line? Is the blue dye even reliable?

I'm 4 days late today and feel "off" with some nausea in the am - not throwing up, stomach feels a little tight and twinge, clear/wet cm....but not like AF is going to come (no cramping). I took a hpt this morning but didn't realize I had bought the blue dye kind instead of the pink. My question is are these even reliable?? I see a vvvvfl but wanted another opinion in case I have line eyes or if this is even accurate!