Stress and Periods

It is possible you could get your period SOONER because of stress? A couple weeks ago I was super stressed because I had withdrawal unprotected sex so I was nervous about being pregnant. Woke up today and my legs started hurting like they always do when I’m about to start my cycle and I just checked my underwear and I’m pretty sure I just started. Doesn’t look like implantation bleeding.

I’m about 3/4 days earlier than my expected period.