Why is my period early? Urgh 😕

Ch

I have always except maybe once (but cuz of plan b then) gotten my period on the day glow says new period day. Not this month didn’t take plan b didn’t even have sex as much and haven’t done anything different and I get my period 2 days early??

Does anyone know why ?? Its always exact.. this ever happened to you if your exact regular ?? Did you find out why? Urgh I’m aggravated..

Thanks !