i dont want to get into the habit of co slleping but i am so tired i fall asleep while feeding my 2 week old baby lying down. she will sleep for up to 3 hours when she sleeps with me but only manages up t 1 hour in her crib. she currently feeds for over an hour and falls aslle while feeding. dont think she is getting enough food. does her weight effect how oftern she feeds. she is putting weiht on but is only 6lb 4oz