what do you think

Hey ladies! So I need some advise and tell me what you think. I had protected sex about the beginning of Augusts I started my period that August. Well this month my period is late by two days. I am completely freaking myself out and making myself so sick over it. I took a pregnancy test like 4 days ago and it was Negativye. I don't feel sick like Nauseas or Diahrea. When I think about me being a mother with a guy who doesn't live here I get a little dizzy but it goes away once I stop thinking about it. 
Thoughts on this? My period is late by two days. Could it be because I'm stressing myself out??