Late but not pregnant

Katey

I an very regular. My period comes every 30th day and usually around the same time in the morning. I am now almost 2 days late but I took a cheapie from walmart and it was negative. I then took a blue dye that was a few dollars and after 5 mins it looked like there was a light line but its blue dye so I don't trust it. There have been times I definitely wasn't pregnant and a blue dye made me think maybe I was. I keep cramping like AF is coming but it just won't start. I've been trying to get pregnant for almost 2 years so I don't feel hopeful. I just can't get over being late. Anyone else in or been in this situation?