Has anyone ever fainted before their period?

Liv

Hi all, I don't have a history of fainting but my period is about a week away and I've been having some back pain- this morning I got up to get a Tylenol and I'm pretty sure I fainted- went to eye doctor to rule out anything else like tumor or something but I'm wondering if this happens to anybody else or if it was bc of something else like dehydration etc