6 days late period, could i be preggo?

Ba

-6 days late for period

-took a pregnancy test 2 days ago and read NOT pregnant

-crampy on and off front and back area

-crabby

-tired, but I also didn’t get great sleep last night

-used to be on birth control before I had my 1.5 yo but now I’m not and we use pull out method and he has NOT gone off in me forsure

-had irregular periods hence why I started birth control when I was 19 yo

Could I be pregnant