BFN but still pregnant?

I am on CD 65..yes, I said 65. I have NEVER had a cycle like this. I am NEVER late for AF; I have always had a regular 28-32 day cycle with periods lasting approx 4-5 days. I have taken 7 hpt with all of them being BFN. Almost every one that I have taken the color stuck on the "positive" line for a minute, but eventually always faded into the control line. Is it possible to have this many BFNs and be this far out and still be pregnant?