My period finish yesterday and since yesterday my lower back is hurting... similar pain that i get before my period.

What can it mean???

-im very irregular (4-5) periods a year

-my period lasted for about 4 days.. last 2 days were old blood (black blood)

-never use protection, actually ttc but i dont think its anything related to pregnancy since i just had my period PLUS im very irregular and its hard for me to get pregnant.

-my boobs been itching lately (but i thought/think its because of my period or weather)