I'm THIS late!

I'm very late for my period, when I'm usually a regular person. Only trouble is I've gotten two BFN's. But I'm so confused because I've never missed a period in my life. Slightly strange. 
​Could I still be pregnant even if I have had 2 BFN's?? 
​Here is my chart. I haven't come on my period at all so in 7 days late..