How To Treat Irregularity Of Periods?

hi im 24 years old and i have a question based on menstrual cycle. on oct. 25th to 29th i had my period then in nov. i had gotten my period on the 29th to the 1st as you can see it was a short period so i was wondering should i be getting my period on the 1st of jan. or should i have gotten it on the 29th of dec?