Pregnant?

Jyoti
I am officially 2 weeks late on my period, I took a hpt when I was 13 days late and it came up negative. I have a regular period, like clockwork so the fact that I'm late and that to, 2 weeks at that and I'm getting a negative makes me wonder whether I am pregnant or not. 
Has anyone gotten a super late positive? 
I'm kind of at the point where either give me my AF or a BFP!!
How much longer should I wait to test again?