How long do you nurse for?

Am

So baby girl is 6 weeks and only nurses 7-12 minutes per session recently before she turns away from the breast and doesnt want to relatch. I keep trying to get her to relatch and even when I do it doesnt last long before she gets angry and pushes away and cries. I know she is getting lots of milk becuase when she pushes away her mouth is still full of milk and I end up wearing it. How long is everyone else's sessions???