How To Supply Breastmilk

Hi mummies, I just gave birth to my girl at 38 weeks, and so far my breast isn't making enough milk so far no matter how much massages I do to it, even from the nurses. I really feel bad and sad for my baby girl, that she has to go formula milk for now because of my milk supply. How do you make your breast supply more milk after giving birth or was it normal to have not enough supply after give birth? I truly feel bad for my girl tho. ?