Help me

So I had sex on August 8th and we used protection and it didn't break. I'm a week late. But I've been really stressed because I just started a new job and started my senior year. And I've been fighting with my boyfriend lately. And fighting with my parents. And a couple days ago my friend got into a really bad car accident. But the passed couple days I've had cramps and been really irritable. Do you think it's just late cause of stress? Or could it be because I'm pregnant.