I finally started my period in it light spotting in my blood is pinkish i also started early in my body is all of a sudden sore nipples still sore?

Pregnancy test.: If you're not using birth control, i would check a pregnancy test first as some of these symptoms are pregnancy like. Not all bleeding is your period as well. This could be just spotting, if the problem persists see your gyn provider.

Irregular periods : 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.