Negative pregnancy test, but late & abnormally light period

Has anyone had an uncommonly light period that arrived a few days late? I took a text last Thursday morning, which was my expected start date, that read negative. I finally had some very light spotting Saturday night and since then, this month's flow has been very very light which is uncommon for me. Though I know it's hopeful thinking that maybe I am pregnant, I have zero normal pregnancy symptoms people talk about which leads me to believe its just an off month. Anyone had something like this happen to them?