I'm in the same boat as you all. Today I'm 8 days late. Normally have a 31 day cycle and haven't been late in years. 3 days before AF was supposed to show, I woke up with a sudden cold and fatigue. I assumed AF was coming early because I tend to get sneezy and tired the day before, but she never came, and the cold was much worse than my usual symptoms. I still have the cold 11 days later. Have been sleeping almost non-stop. Itchy, dry eyes. Crazy thirst. Mild headaches. Weird eye twitches. Weird discomfort in my abdomen, but not really like cramps. And I've gotten 2 BFNs on FRERs.
When my mother was preggers with me, she got a blood test at 4 weeks, and it came up BFN. Two weeks later, did another and BFP. With my brother it took 11 weeks before a BFP. I hope that's not the case for me, but it gives me some hope! Will test again tomorrow and go to the doc Friday if still BFN/no AF.
Good luck, ladies! The waiting is the worst part!