1 day after period ended felt let down in left breast. its like heaviness which goes after sometime. not pregnant. breastfed five years ago. also when i squeeze the nipple milk comes out?? i am 33.what this can be?? can hormonal change cause it??

Breast heaviness ?'s: In one's thirties, estrogen and progesterone levels increase , with consequent effects on breast tissue as described. See your gyn physician for an exam, and ask about low dose oral bcp's, which stop ovarian production of hormones and provide a low dose of hormones which sustain normal functions and reduce effects on breast tissue.