Currently 4 days late or more , maybe pregnant ?

Heres some facts about the situation : My period is somewhat regular anywhere from 27-30 day cycles usually. Last cycle was a 22 day cycle getting my period on aug 11. I had unprotected (ejaculated inside me) on aug 22 which is a day before my predicted ovulation period started on this app (another app says i ovulated on the 24)

I am currently 4 or so days late & when i check cm it is creamy white and ive been feeling kinda weird. I took a dollar store pregnancy test 4 days ago and it was negative .. What do u think?