Breastfeeding and feel like I’m failing

I really feel like I’m failing at this breast feeding thing My baby girl is latching on great but only feeds on one side per feeding. Which I know can’t be enough. And she doesn’t feed long either maybe 10 or 15 minutes. 20 minutes max. And she’s hungry again around an hr or 45 minutes. I was pumping a lot but I stopped because I feel like my production slowed down so I started latching only but idk if she’s getting enough. I’m sure she’s not cause she’s always hungry so fast again after a feeding. I’m just needing some positive words I need help mamas. 😪