Late AF!

Well AF was due on the 17th, she was a no sho. Im currently 11 days late. This has never happened before. About 2 weeks before AF was due I had cramping like AF was on the way and never came. Since then I continuousky have nausea and bloating like fullness where cramps usually are. Lower pelvic region. Ive been getting BFN's however I stopped testing 2 days ago. Is it possible to be this late and still be prego without a BFP? I will say that I had 2 different tests on 2 different days come up faint fain faint, I mean real faint positive but I assumed along the lines of evapish. Wondering if anyone experienced this.