Period after sex.

Bianca • 22. Mother. Wife. Houston Texas.
So I wasn't due for my period for another week and yesterday morning my SO and I had sex unprotected. This morning I woke up spotting. The sex wasn't rough at all, just casual normal sex. And my flow is super light. Wouldn't even call it a flow lol it's never happened before bit can sex cause your period to come earlier than expected?