likeliness of a false negative!?!

Samantha
I took a test this morning that was negative... AF is 5 days late now...   the only symptoms of anything that I have had is some light cramping on and off since a day or two before AF should have shown....  
I have done a few things that I know usually help her show her face, like baby dance and exercise with no luck...   no spotting or anything....  
is it possible that I am pregnant and the test was a false negative!?!?