Oh, actually the OP is a friend of mine. Since she might be quite busy struggling with her 4 week old baby girl, and taking care of her 21 month old toddler as well, I might try to answer some of the questions for her.
According to her, her baby hasn't gained lot of weight, and although the baby was regularly wetting the diapers, the diapers are usually scarcely wet. At the MCHC, the doctor was a little bit concerned about that, and suggested that she should feed, or at least, complement with formula.
I suggested her to contact LLL, and see some lactation consultant before giving up. She did called some LLL leaders for advices, and also went to see Mrs Chee. At Mrs Chee office, she tried to pump milk from my friend, and could hardly get 1 oz of milk out. Mrs. Chee did think that she indeed has too little milk, and gave her some medication (probably domeridone) for increasing her supply.
From what she told me later, the medication wasn't helping a lot, and she has started giving more feed with formula.
As a note, my friend is in care of a Chinese confinement lady, who is making sure that she gets a healthy diet and plenty of rest. In fact, she told me that sometime her baby would wake up in the middle of an afternoon nap, and her confinement lady would not allow her breastfeed the baby, stating that she need to get more sleep. Her confinement lady would then rock the baby back to sleep..............