By what you are saying you have found a balance, which is working in the sort term.
I can only suggest that you just relax and allow a little time for all of you to get over the birth and find a way forward over the coming weeks and months. It may be that as the baby grows and develops he can again enjoy his mothers milk as this will contain antibodies, which my help to support his immune as he develops.
I am also getting a message to tell you to give him a little local honey as this contains many of the local pollens and trace elements and minerals. Please do this with your doctor’s authorisation, as I do not know the full implications of this.