Tks a lot for your answers! I will try from today to feed her every 3 hours instead of every 4 hours - as I've been doing and hope for more milk to feed her and store, cause I will be going back to work!
I gave birth to her - via vaginal. She had trouble latching on, so I had sore nipples and mastitis in both breasts in our 2nd week. I had to use formula in this period, but for the past month I was able to go back to breastfeeding exclusivly. Once in a while, if I was away from home or didin't have enought milk I'd suplement with formula - using either finger feeding or the straw in my breast. I never used a bottle to avoid nipple confusion or weaning. I also don't pump to avoid hurting my nipples again. When needed (either engorged breasts or if there is enough milk to store) I manualy express milk.