2 weeks late, still negative

On 3/31/16 I will officially be 2 weeks late. I have never been late for a period EVER. The week that my period was due I had nausea, cramping, fatigue, and an increase in discharge. Last week and still today I just have on and off cramps and an increase in discharge. I'm going Friday to check and see if I'm preggo since all home pregnancy tests keep saying negative. Has anyone else ever experienced this?