I started my period early???

Hey guys,
So normally my period comes like clockwork. It's always 2 days after glow predicts around 10am-12pm that it's starts. But I started last night, which is 5 days before glow predicted. Does this mean anything? I looked it up online and of course that's probably the worst thing I could have done because there're millions of reason and problems that it could be. But I'm about 7 days early and that's super weird to me.... thanks for any help and insight.