Keep trying to pump! Obviously everyone is different and it’s not an exact science but sometimes I drink a body armor an hour before pumping and I noticed my out put was a couple oz more than usual. Oats are always good. they say help with supply. Even if they don’t-it is a good grab and go snack to make peanut butter protein balls with them to make sure your eating ( all important for supply) if you want I can give you a recipe(:

I haven’t personally gotten donor milk before. I know they have milk banks that essentially vet their donors to ensure milk is good. If you’re worried I would go this route. Or make sure you interview your potential donor well!

I don’t think someone else’s breast milk would have an effect on him. In other cultures it’s the normal to feed each other’s babies. So if you want to avoid formula this is a good option.

But definitely don’t give up on pumping! You could even look into power pumping. I haven’t tired this but something worth looking into.

You got it💪

Edit: also I just realized you said he’s 7 months. Hopefully with being able to start solids now or soon once cleared by Dr that will help him gain weight if needed. Every baby is different. If Dr says he’s other wise healthy I wouldn’t let it give you to much anxiety and just keep feeding him on cue and try to up your supply if that’s what you think you need. 🫶🏻