AF Due today, but no signs shes coming?

Well, AF was due today and nothing so far but an increase in CM. Ive been really fatigued and definately experienced some body aches. I have a 23 day cycle and cm usually dryer when I start AF, but theres definately an increase instead. I took a test yesterday and today, both FRER and from what I can tell, they're negative. Anyone ever experienced this and was pregnant? With my daughter I was a few days late before I got a positive...wondering if its the same this time with baby #2, or if I'm just late. I have been stressed and sickly..so who knows. Really hoping my HCG just isnt up enough yet, and we are preg!