A little concerned

I'm stressing. I am 8 days late. My tests with my other babies have always been dark or get dark as each day passed. These have been pretty faint. I took the first picture last night and I took the second picture this morning with fmu...it looks lighter and I could barely see it in full light. Has this happened to any of you and they got darker and you stayed pregnant? Am I even considered pregnant? Sorry, this is just new to me and I really wanted to surprise my Hubby on Valentine's Day.