You can take a look at this page:
https://www.facebook.com/hm4hbSingapore/home
It is the community for sharing breastmilk in Singapore. Typically, the donor will provide information in which you can read through and find one that best suits your baby. You can then contact the donor and I think you can clarify any other questions you may have.
Hope this helps!
In the meantime, you can try to pump more, experiment with different milk boosters, drink more water and get as much rest as you can.
Hang in there mummy!
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