This may not be a popular answer but here it is... I switched to formula for this very reason. When my twins came home from the NICU they had not yet become successful breastfeeders, so every 3 hours, I would try to breastfeed them, then give them a bottle, then pump for 15-30 minutes to try and increase my supply... basically in a 3 hour period, 2 hours was all about feeding... all day and all night long. I was exhausted, the twins were miserable, I was frustrated and felt like a failure and wanted to cry all the time. The lack of sleep was destroying my mental health, I couldn't even enjoy these 2 beautiful babies I had been blessed with.
I finally gave up trying to breastfeed and it was the best thing I could do for all of us. They still ate every 3 hours but it took me 30-45 minute to feed the two of them so we ALL got more sleep at night... and the best thing... when I really needed more then 2 hours sleep at a time... my hubby could feed them!!!! They started to thrive on the formula. Gained weight appropriately, were healthy and happy. I could increase their intake as they needed and soon they were eating more throughout the day and sleeping longer at night. Best thing I could have ever done for us. With more sleep, my emotions stabilized and rational thinking returned and the first time since they had been born, I could finally just enjoy being their mom.