I just want what's best for my babies.

I have been EBF for nearly 13 weeks but today's weight check has changed that. I'm now having to do formula top ups, because my daughter has pretty much nearly lost a pound in 3 weeks. She is way lower in the centiles *below the 0.4th*. I am hoping this is temporary. She's got a faltering growth appointment at the end of the month and hoping she gains weight by then and we can continue breastfeeding but this isn't looking good at all😭😭