4 days late, mixed test results

Je
I've posted before about my situation with my unclear results all with first response  , I had very faint lines , this morning it was a clear negative ... my period is currently 4 days late I had very light dark brown spotting with some right pelvic cramps ... I'm 28 and never have been a day in my life , I'm extremely nauseous, dizzy on and off, barely have an appetite ... I'm now starting to think maybe I had a chemical pregnancy. I ovulated on October 16/17... please anyone can u offer some insight and experience ... I'm driving myself crazy over here ! 😩