Breastfeeding!!!!

Ladies Help! How do I get breast milk to be enough! I breastfed baby he loved colostrum and I noticed after my milk was here he fed every three hours and now I feed him when he wakes up hungry not following a schedule just estimate he feeds crying out after just feeding for forty minutes and sleeps and poops just one or two hours later is crying out for food doesn't sleep and the thing is if we fed one hour ago my milk hasn't came for next feeding what can i do