Girls, how to stop a child from breastfeeding, already two days I'm no…

Girls, how to stop a child from breastfeeding, already two days I'm not feeding during the day, but at night it's impossible (without breasts he can't fall asleep, that's why today I tried to put him down without breasts, he was crying and everything (already 3 hours of the night, had to give and fell asleep immediately)