I've been trying to get pregnant for ok ver a year.. my period has always been early 😶🙄

My last period was July 1-4 I have not had a period since... so I took a pregnancy test like two days ago.. negative. 😭 I dont know what to do at this point... I'm so worried about it I legit keep checking to see if I've started and still August 17 still no period.. what should I do? Or what could this be?