Pregnant no bfp? *long*

Have any of you ladies experienced this? Being pregnant and not ever getting a bfp or at least a really delayed one?

I am a week late today and am having a bunch of pregnancy symptoms. The only pms symptom I get is SEVERE cramping. So here it goes.

I am having HORRIBLE indigestion, nausea, extreme fatigue, hot flashes, headaches/migraines, really full and heavy boobs, missed period, uterine twinges/flutters/mild cramping, urination every 15-20 mins, at 3-6dpo increased cm (like ALOT) and at 7dpo I had a metallic taste in my mouth. Along with I am biting my DHs poor head off at the slightest things! Im eating everything in sight especially meat and I am bloated.

I have taken a total of 5 tests (4 walmart cheapies and 1 FRER) 1 walmart one was a super faint +. But my FRER was negative. I dont want to go in for blood work until I am 2 weeks late. Ive heard that some women are pregnant and they dont get a + hpt or blood test ever. And they find out by an ultrasound when AF doesnt show for months. Im just curious how common is this? Has anyone experienced this and could help me? Thanks !! Please give me ANY advice you can.