Re: got my period a week early... sort of
There's really no reason to think you're going through menopause or that there's anything serious going on. Women freak out if one time their period is early, late, long, short, etc. Your OBGYN isn't going to be able to tell you why this one time something is different. The only thing they might suggest is that this type of thing can happen when you're pregnant. So if there's a remote possibility, take a test. If not, don't worry about it. It's happened once so far.