Negative tests, late period

Anyone had negative tests the day you were supposed to get your period but ended up pregnant? I’m either 3 days late OR my period was supposed to start yesterday or this morning. & nothing. I’ve been SO nauseas to the point where I don’t wanna do anything, my lower back has been hurting so bad, super tired/ bloated. I’m never nauseas when I’m about to get my period, it’s never been a symptom of pms for me. I’m so stuck idk what to do, any help ladies?