I am 4 weeks late of my period t morrow and I put a test in and it cae back negative could I still be pregnant

Hi my last period that I had was on th 26th aguest and I finishedon the 30th aguest and haven't had a perid since I am 4 week late the morro culd I still be pegnant ad my home test came back negative

If your last period was August 26th-30th... how is it possible that you can be 4 weeks late? You're just due around now so how is that late?