How much weight should a one month old baby have gained at this point? I’ve been weighing baby at home on my bathroom scale. Not a baby scale.

And it shows that he keeps losing ounces, and it fluctuates every single day. I’m not sure if the scale isn’t accurate or not. But it’s accurate for me, so I figured it would be for him too. He looks really skinny. But he’s long. He eats well. He’s exclusively breastfeeding, has plenty of wet and dirty diapers. He doesn’t have another weight check for another week, but if he’s losing I was going to supplement with formula because I don’t respond to a breast pump at all.