Hi! I just need a little guidance. So I am currently on the combined birth control pill and have been for 6 years. I take it very regularly and its rare that I miss a pill. Because of this, I have very on schedule periods.. however, this month I have suddenly got a 2nd period out of nowhere, 2 weeks after my normal period. This is weird for me because I did not miss a dose or take it incorrectly.

Could somebody give me some guidance on what this means?