5 days late .. 3 negative test

... So I took my first test 5 days before my missed period , & negative ... Took another one 1 day before my missed period . Negative!! I was 4 days late for my period yesterday & took a test. All negative , I even switch hpt!! I'm never now 5 days late for my period! Ever ... Why are my test negative ! It worries me bc if I am prego ( which I feel I am) I think my HGC is low & that's not good !!  I mean I feel prego (bloated) I'm urinated every 30 mins.. Tired all the time & fatigue .. I'm checking my breast for tenderness but I'm not depending on that bc I had a breast reduction back in March ! My hubby & I want another baby badly !!!! #Help!!