My baby is 3 months old. She typically breastfeeds for 30 to 45 minutes. She doesn't pull off. She would do it all day and night if I let her. The only way I know she is done is to break the seal and see if she cries. She used to hold out for about an hour and half between feedings. Now she wants to eat every 45 minutes. I know it's different for every baby, but is this "normal" or she just using me for a pacifier?