CD 59 - 19 Days Late / NO BFP

I'm getting myself in all sorts of worry. My cycle has been getting longer since December 15', it's longest prior to this being 45 days. We're now on 59 days, I'm almost 3 weeks late and all I'm getting On hpt is BFN all the time. I had a faint positive when I was 2 weeks late but tested 2 days later and got yet another BFN. I've always used FMU with hpt. I'm so worried and confused now. Somebody help!!!