Is there a line?

Jamie
This is so fruatrating. My period was due on Friday and nothing. I've been taking tests everyday. The last couple look like a very very faint line but I feel that my mind is just playing tricks on me. Can I be pregnant? When you are disappointed every month it's hard to believe that what you have been waiting for could happen. 
UPDATE.. I want to get blood work and it came back negative. I'm very confused. So does this mean I am absolutely not pregnant?