Any chance I’m pregnant?

I’ve never had unprotected sex before. My period is already a week late, and it’s never been more than 3 days before. I took a pregnancy test and it said negative, but It still hasn’t come. I’ve had a lot of stress (left my job) and changed medications. Is it normal for stress to cause it to be this late?? I’m just asking because I’m super regular usually down to the hour (no joke).

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