Boarderline FTT

I’m feeding my baby nearly every two hours 2-3 ounces, day and night, yet his weight gain is slow. I don’t pump enough milk, and my only choice is to pump since he’s slow to gain, so I pay for someone else’s milk to supplement mine. Yet he’s still boarderline. I don’t know what to do. All I know is that I’m failing, and all I want is to make his life, even as an infant, good, but now I’m worried about what FTT is doing to his body and brain. 😭 I’m struggling to feel as connected since we’re no longer feeding from the breast. Dad does what he can to take the load off and help, but I’m not producing enough milk, I’m always needing a nap, I barely have time to do anything. My life is feed for 30, pump for 30, have 30 min to sleep and/or cry and repeat. Just hopelessly ranting. I’m so tired. And sad.