I usually feed for 10 minutes and then pull her off. I just heard from someone to let her feed until she was done not me. So I tried it and after that 10 min. my breast started hurting really bad. It is not my nipple that hurts. Does this mean I am out of milk on that side? She never pulls off and never cries that there is no milk but she is a very easy going baby and really patient so I don't know if she would.