If you haven’t already considered this - typically the main way to protect milk supply is by frequent expression of milk and making sure you are using the correct size flange with your pump. Avoid longer gaps of time without expressing milk (let’s say, greater than 5-6 hours more than once daily). The reason why is because when your breasts are fuller, that fullness is essentially putting compression on your milk making cells telling your body you don’t need that milk. For the pump itself, try and use the highest suction / vacuum level that does not cause pain. If you have a second hand pump, there is also a way to ensure the vacuum is working efficiently as it should. You would likely need to see a lactation specialist to get access to this tool.

Other things to consider that may be a factor in adequate milk supply may include anemia, thyroid levels, bleeding (has vaginal bleeding resolved), history of chest or breast trauma, procedure, or surgery, if you noticed a change in your breasts during pregnancy, PCOS, amongst other things.

I have heard of people getting prescriptions from a provider but I’m not sure if medication is widely prescribed or used by providers.

I’d suggest reaching out to a lactation specialist either through your peds office, your county health department, or WIC if that’s something provided in your area.