Breast feeding question


Hi everyone.

My 1week old only feeds from one breast. She'll stay latched on for a good 10 minutes until she pulls herself off and has that "milk drunk" look, my breast feels empty also. After when I try to offer her the other breast she won't take it. My concern is if she's not feeding enough. Is 10 minutes really enough time to be full? I keep hearing 20-40 minute feelings. Does that mean she has to suck for that long or does that include burping (my LO takes a long time to burp). Is 10 minutes really enough for such a young newborn? Also I feed her about every 3 hours but sometimes i think if I don't wake her she'll keep sleeping past that. Idk if I'm doing something wrong. Could really use some support and advice.

Thank you ❤️