TRYING TO IMPROVE BREASTMILK..

Too late na po ba na ma-improve ang breastmilk ko? 2 months na po kasi si baby and mixed feeding sya, since magwowork na ko uli by next month and nung una kasi feeling ko wala syang madede sakin na-engorged sya saglit after nun. I tried to pump last night, unfortunately after 15mins each 20ml lang na-collect ko. Or mag-give up na lang ako? Any advice po? Thank you so much in advance..