Kinda worried

Tina

I’m 28 and my period has always been exact. Like I always start it after exactly 28 days, it always lasts 5 days, and more than that, it always starts a little after 5 in the morning no matter what time zone I’m in. Suddenly I got my period now, and it’s a week early. Should I be worried? I haven’t gained weight or gone through any huge changes. There are no new medications. I don’t know what to think of this. Is this normal?