I have irregular cycle but last period started 8dec to 12 dec. i had slight spotting on 23 dec, spotted dark brown 1to 6jan with slight stomach ache?

An off cycle: 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.