I had an abortion on aug 21/14 when i found out i had a placenta previa (4 months pregnant) & i went straight to birth control. then i gained weight (20 pounds). i stopped birth control on oct 29/14. i had 2 periods in nov, then my period started on dec 2

Test: I would check a pregnancy test as the irregular bleeding could be due to a new pregnancy.

Please see GYN !: With the history that you provided, it is apparent that you need experienced evaluation by a Gynecologist to determine the reasons of irregular menstrual periods. I strongly urge you to obtain evaluation by your local GYN Specialist.