Negative test but pregnant???

I am currently 7 days late for my period, having light stomach, I wouldn’t really describe as cramp, more like a pinchy feeling in my lower abdomen. Really sore boobs and nipples, headaches, constantly feeling tired and emotional. My periods are usually dead on 28 days apart. I’ve done 3 tests including the fast response ones. All negative. Anyone experienced anything like this and been pregnant? Thanks in advance!