What are the chances if your period one day early and it only lasted for two months in a row?

It is not possible for a period to last only two months in a row. A typical period lasts for 3-7 days. If your period was one day early and lasted for only two days, it is possible that it was a shorter-than-usual period or that you were experiencing spotting. Spotting is light bleeding that can occur before, during, or after a period. If you are concerned about the length of your period, it is always best to consult with a doctor.