My period came 10days early and only lasted 2 days and was lighter than normal. i'm 22 and this has never happened.any suggestion on what could it be?

Irregular period: Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections & hormonal changes can cause spotting. If there is a concern for pregnancy then do a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.

Many thoughts: Could be just irregular period. You could be pregnant If sexually active Start there