Af is late

Nicole
Okay y'all so aunt flo is officially 4 days late... lord knows I'm praying she doesn't show her ugly face but at the same time I am very worried... I have never been late and if I was it was by a couple of days and had cramps to go with it or I was pregnant... well this month it's much different... I had cramps last week for maybe 3 days but very mild not like usual af cramps... well so my week goes on and I'm 4 days late with extremely sore boobs and fatigue and heartburn and constipation and bloating.. I've taken tests and all are negative... I know something isn't right. I can feel it... I don't feel normal.. has anyone else been pregnant and haven't gotten bfp for awhile? I'm really curious... I mean could I be pregnant and hcg just hasn't gotten up yet... I mean is that possible?