Breast milk taste

Ikram • Mother to one beautiful girl and a boy . Trying for twins if am lucky .

I need help my breast milk tastes gross bitter sour I don't know so I been trying to have baby #3 I stopped breastfeeding about a month ago because there was barely any milk in it my period is due in 1 day I tested today it was negative and one of my boobs is leaking and hurts to the touch any one going through this I would appreciate any info