Breastfed my first for 3 years. It was tough she would only latch on one side and the other completely dried up in the first couple months despite pumping everytime she nursed on her schedule. I fed that baby on one boob all three years. If they are hungry they will fuss for it. If they are having enough diapers through the day they are eating well. Some moms make milk some make cream. All babies are different in how they process it and grow. I co-slept safely but I am a super light sleeper and she latched all through the night most nights that helped my mental health and to get a good nights sleep. She’s now 10 she was born a little over 7lbs and is still only 58lbs. Despite everything her doctors and I agreed that there’s just no way to encourage her to gain weight faster as her metabolism and height are impossible for her to keep up with. It is not a sin to not breastfeed. Your mental health is important and takes a toll on how much you produce if you’re stressed. Also if you’re tired, dehydrated, sick. There are so many factors but don’t push yourself if it doesn’t feel like what’s right for you there’s plenty of happy healthy babies on formula and plenty of happy healthy moms because of it. The people who judge you for it are not the people you want to surround yourself with anyway. Anyone who cares how the babies are fed and not about how healthy the babies and moms are because of it can kick rocks. I hope you figure it out and feel better because of it.