I Have been 4/5 days off from what glow says for starting AF. But Never 27 days, i had some brown blood about 5 days before expected period which has been usual for me. But then nothing came and still hasn't. Certain days i feel like it's coming with mild cramping but then nothing. I have taken 2 tests in the last 2 weeks being 2 and 4 wks late and both have been negative. Soo continue to wait or get blood drawn?