Missed period. Negative test.

Hi! I am 6 days late for my period. Which is unusual. (I’ve been starting a few days early the past few cycles.) been experiencing a bit of mild nausea no throwing up. A lot of bloating. My cervix seems to be kind of high and on the softer side. I’ve been extremely tired (I could sleep all day.) I took a test yesterday and it was completely negative. I have heard some people don’t get a positive pregnancy test until 2-3 weeks after a missed period. Should I wait it out and keep testing or is it unlikely I’m pregnant because I’ve missed my period and got a negative already?