TWW? psh feels like a lifetime...

Hi! I'm 22 years old and my DH is 23. We are ttc our first and have been "officially" trying for 2 months, but weren't preventing before that. My LMP started May 19 and by my chart I would have ovulated around June 14th. (I have a consistent 40 day cycle). It is now July 1st and 3 hpt's later all showing negative. My period was due on June 28th so I am officially 3 days late. I am having some symptoms like fatigue, lower back pain, sensitivity to smells, and random bouts of slight nausea-not bad enough to make me throw up yet.

If AF is going to rear her ugly head I would appreciate her getting on with it so I can move on to trying for next month. Since my cycle is 40 days it seems like it takes an eternity between each O day.

Has anybody missed their period and still gotten a BFN only to get a BFP later? Could my HCG still be too low for the tests to read or am I just getting my hopes up?

Thanks in advance for any help.