Re: Retained placenta resulting in very low supply?
Welcome to the forum!
Retained placenta can cause delayed/reduced milk production. As long as a piece of placenta remains inside, the mom's body acts like it's still pregnant, and lactogenesis II (the onset of milk production which follows the abrupt postpartum decrease in progesterone levels) doesn't take place or doesn't reach full expression. Since you just passed a sizable chunk of placenta a few days ago, I think it's very reasonable to think that the above is/was a problem for you. I would immediately contact your OB (or perhaps another doctor, one who may see the situation with fresh eyes?) and discuss the situation. If the D&C didn't get the whole placenta, there's still a chance that there's something more lurking inside and causing you problems.
ETA: maybe ask the doc if he/she can check your progesterone levels? If they're still pregnancy high, that might indicate that you still have some leftover placenta.
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